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Early infant development is a maturation process critically depends on the infant's interaction with primary caregivers. Hence, neonatal units prioritize their proximity. In COVID-19, parental visitation hours were limited, reducing caregivers time with their infants. This follow-up study analyzes and compares levels of maternal depression and stress, infant development, and bonding quality in preterm mother-infant dyads hospitalized, before and during the pandemic. Out of 66 dyads participated, 36 were admitted before COVID-19, and 30 during COVID-19. The assessed was two video-call sessions in which mothers completed selected questionnaires. No significant differences between mothers' levels of depression and stress. However, low birth weight was associated with greater difficulties in children's communication and interpersonal relationships. Furthermore, infants hospitalized in COVID-19 had a higher risk of experiencing delayed communication. No significant differences were observed in bonding quality. Lower infant gestational age and longer breastfeeding time were associated with better bonding quality in both groups. Psychosocial intervention is considered a valuable tool, capable of preventing maternal mental health difficulties and protecting bonding in premature infants and in highly complex healthcare settings. Nevertheless, it is essential to more actively address the socio-affective needs of newborns during their hospital stay to promote adequate development.

El desarrollo infantil temprano es un proceso de maduracion que depende críticamente de la interacción del infante consus cuidadores primarios. Por tal razón, en las unidades neonatales priorizan su proximidad. Durante el COVID­19, se limitaron las horas de visitas de los progenitores, lo que redujo el tiempo que los cuidadores con sus bebés. Este estudio de seguimiento analiza y compara el nivel de depresión y estrés materno, el desarrollo infantil y la calidad del vínculo afectivo en díadas madre­bebé prematuro hospitalizado al nacer, antes y durante la pandemia. De las 66 díadas participantes, 36 fueron admitidas antes del COVID­199 y a 30 durante el COVID­19. Se realizaron dos sesiones de vídeo­llamada, en las que las madres completaron los cuestionarios seleccionados. No se encontró ninguna diferencia significativa entre los niveles de depresión y estrés en las madres. Sin embargo, un bajo peso al nacer se asoció con mayores dificultades en la comunicación y las relaciones interpersonales en los niños. Además, los infantes hospitalizados durante el COVID­19 presentaron mayor riesgo de experimentar retrasos en la comunicación. No se observaron diferencias significativas en la calidad del vínculo afectivo. Una menor edad gestacional del infante y mayor tiempo de lactancia materna se asociaron con una mejor calidad del vínculo afectivo en ambos grupos. Se considera la intervención psicosocial como una herramienta de valor, capaz de prevenir dificultades en la salud mental materna y de proteger el vínculo afectivo en infantes nacidos prematuramente y en entornos sanitarios altamente complejos. Sin embargo, es esencial abordarmás activamente las necesidades socioafectivas de los recién nacidos durante su estadía en el hospital para promover un desarrollo adecuado.

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BACKGROUND: Cancer disproportionately affects Hispanic populations, yet the preparedness of Hispanic caregiver-patient dyads facing cancer remains understudied. This study aims to identify essential components of preparedness needs and inform future psychosocial interventions for this demographic. METHODS: Secondary analyses were conducted utilizing focus groups to develop a communication intervention for Hispanic patients and caregivers. Transcripts were qualitatively analyzed using NVivo v12 (2020). RESULTS: Analysis revealed symptom management and treatment comprehension as pivotal aspects of preparation. Additionally, preparedness among our sample emerged by addressing the multifaceted dimensions of preparedness, including psychological, emotional, educational, familial, practical, financial, and spiritual aspects. CONCLUSIONS: Tailoring interventions encompassing diverse dimensions of preparedness can foster inclusivity and maximize their impact on supportive measures. This underscores the necessity for culturally sensitive approaches when delivering interventions supporting Hispanic individuals navigating the challenges of cancer.

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Background: Cancer affects the emotional well-being of patients and caregivers, highlighting the need for effective communication strategies. This study explores a community-based communication intervention for Latino caregiver-patient dyads coping with cancer. The acceptability of the intervention, along with its associated facilitators and barriers, are crucial considerations. Methods: Three focus group interviews involved healthcare providers, community partners, patients, and caregivers to discuss the communication needs of this population and the components of a communication intervention while identifying facilitators and barriers to the intervention. Qualitative thematic content analysis was conducted using Nvivo v12, ensuring reliability through independent analysis and consensus building. Results: Participants (89% female, average age of 53) included patients (30%), caregivers (30%), community partners (25%), and healthcare providers (15%), and they discussed the overall acceptability of adapting a communication intervention, where they emphasized benefits for caregivers and patients, primarily through support groups. Communication strategies accepted by participants include psychological support, cancer education, assertive communication skills, and methods for improved interactions with healthcare providers and extended family. Conclusions: Participants' responses align with the current literature, emphasizing problem-solving, mutual support, and communication strategies and underscoring the role of community partners. The study underlines the necessity for culturally tailored communication interventions for Latino families facing cancer.

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PURPOSE: The objective of this study was to investigate the relationship among hopelessness, anxiety, and depression, with spiritual well-being in patients and family caregivers. METHODS: A cross-sectional survey was administered to patients (n = 57) and caregivers (n = 57) that incorporated assessments that measured spiritual well-being, depression, anxiety, hopelessness, quality of life, family relationship, burden, fatalism, religiosity, and distress. Logistic regression and cross-tabulation analyses were conducted to examine the relationship between hopelessness, anxiety, and depression, with spiritual well-being. Logistic regression was used to quantify the impact of spiritual well-being on anxiety, depression, and hopelessness. Additionally, cross-tabulations with chi-square tests were conducted to explore associations between severity of hopelessness and severity of anxiety and depression. RESULTS: Logistic regression analyses showed negative associations between spiritual well-being and mental health outcomes, although not all findings were statistically significant. Among caregivers, a significant negative relationship was observed for depression (B = - 0.161, p = 0.022). Hopelessness also exhibited a negative association with spiritual well-being among caregivers (B = - 0.099, p = 0.054) and patients (B = - .152, p = 0.038). Cross-tabulations highlighted significant associations in the severity of hopelessness symptoms with anxiety and depression levels among caregivers (p < .001). CONCLUSION: Results reveal a relationship among psychosocial symptoms among Latino patient-caregivers coping with cancer. By emphasizing spiritual well-being, hopelessness, and anxiety and involving family patients and caregivers in the treatment process as a unit of care. Also, it indicates the need to develop culturally tailored interventions that aim to provide valuable assistance to Latino patients and caregivers coping with cancer.

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Resources that individuals acquire at work can have significant effects on their own well-being and family satisfaction, and on those of their closest family relations. Following the conservation of resources theory, this study examined the effects of work-to-family enrichment (WFE) on psychological distress (depression, anxiety, and stress) and family satisfaction (SWFaL) in different-gender dual-earner parents. The sample consisted of 473 couples - mother and father - from Temuco, Chile, who answered the Work-Family Interface scale, the Depression, Anxiety and Stress Scale, and the Satisfaction with Family Scale. The analysis was conducted using the Actor-Partner Interdependence Model (APIM). Results showed that WFE was positively associated with SWFaL for both mothers and fathers (actor effects), whereas higher WFE was linked to lower psychological distress only in fathers. For mothers and fathers, psychological distress was negatively associated with their own (actor effects) and the other parent's SWFAL (partner effects). The mediating role of psychological distress was found only for fathers' WFE and their SWFaL. These results indicate that resources from work can increase family satisfaction for both fathers and mothers in dual-earner couples with adolescent children. However, in these couples, fathers acquire affective resources (positive mood) that reduce their own psychological distress, while mothers acquire skills (managing time at home more efficiently) that they invest directly in the family domain.

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Proximity and interpersonal contact are prominent components of social connection. Giving affective touch to others is fundamental for human bonding. This brief report presents preliminary results from a pilot study. It explores if exposure to bonding scenes impacts the activity of specific muscles related to physical interaction. Fingers flexion is a very important component when performing most actions of affectionate contact. We explored the visuo-motor affective interplay by priming participants with bonding scenes and assessing the electromyographic activity of the fingers flexor muscle, in the absence of any overt movements. Photographs of dyads in social interaction and of the same dyads not interacting were employed. We examined the effects upon the electromyographical activity: (i) during the passive exposure to pictures, and (ii) during picture offset and when expecting the signal to perform a fingers flexion task. Interacting dyads compared to matched non-interacting dyads increased electromyographic activity of the fingers flexor muscle in both contexts. Specific capture of visual bonding cues at the level of visual cortex had been described in the literature. Here we showed that the neural processing of visual bonding cues reaches the fingers flexor muscle. Besides, previous visualization of bonding cues enhanced background electromyographic activity during motor preparation to perform the fingers flexion task, which might reflect a sustained leakage of central motor activity downstream leading to increase in firing of the respective motor neurons. These data suggest, at the effector level, an implicit visuo-motor connection in which social interaction cues evoke intrinsic dispositions toward affectionate social behavior.

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Background: The non-clinical presentation of obsessive-compulsive symptoms (OCS) in women may impact not only their daily lives and well-being but also increase the risk for emotional and behavioral problems in their children. This study aims to investigate the OCS dimension distribution in a large sample of mothers from a cohort of school age children and the association between these OCS dimensions with their own psychopathology, and with the presence of OCS and other psychopathology in their children. Method: Our final sample consisted of 2,511 mother-children dyads recruited from the elementary schools of two large cities. Throughout multiple regression analysis, we examined the correlations between demographic and clinical variables of mothers assessed by the Mini International Psychiatric Interview (MINI) and the Dimensional Yale-Brown Obsessive-Compulsive Scale-Short Version (DY-BOCS-SV) with children's psychopathology status reported by the Child Behavior Checklist (CBCL). Results: The overall prevalence of mothers who reported experiencing at least one OCS was 40% (N = 1,004). "Aggression/violence" was the most frequent symptom dimension (32.2%), followed by the "symmetry/ordering" (16.4%) and the "sexual/religious" dimensions (13.8%). There was a significant correlation between the presence of OCS and maternal psychopathology in general (p < 0.001, r = 0.397). Not only the presence but also the severity of the mother's OCS were strongly correlated to the total (p < 0.001), internalizing (p < 0.001), externalizing (p < 0.001), and OCS subscale scores (p < 0.001) on the CBCL. Conclusion: OCS dimensions are highly prevalent in women. Presence and severity of maternal OCS are related to children's psychopathology and behavioral problems.

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Language brokering is a special form of interpersonal communication that is affected by the cultural and relational settings in which it occurs. The current study explores whether parent-adolescent acculturation status may influence Mexican American adolescent language brokers' translation experiences, including brokering frequency and attitudes. Using data from a two-wave longitudinal study (Nwave1 = 604; Nwave2 = 483; Mwave1.age = 12.91; 54.3% female), latent profile analyses were conducted, resulting in four mother-adolescent acculturation profiles as well as three father-adolescent profiles. The adolescent integrated-parent (moderately) separated profiles emerged as the most effective for brokers, as adolescents in this profile generally experienced more positive and less negative brokering attitudes, regardless of their brokering frequency. Parent-adolescent acculturation profiles may be a useful construct in capturing the interplay of cultural and relational settings and their effects on multifaceted language brokering experiences.

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OBJECTIVE: To explore the feasibility of using an image-based food photography methodology (Remote Food Photography Method) in a rural, low-resource audience and use the photos to examine the context of family dinner. DESIGN: Parents used the SmartIntake app on study-issued tablets to take before and after photos of their and their child's dinner for about 7 nights and participated in a mini-focus group to discuss their experience with the Remote Food Photography Method. SETTING: Six Head Start/preschool centers in rural Colorado. PARTICIPANTS: Mother-child dyads (n = 31). VARIABLES MEASURED: Number and quality of photos received, participant feedback, meal timing, concordance, location, preparation, and quality. ANALYSIS: The researchers assessed feasibility via practicality (percent photos received) and acceptability (general inductive approach used to analyze mini-focus group transcripts for participant feedback); time stamps, meal quality, and food preparation scales were used to analyze dinner photos. RESULTS: The majority of photographs (738 of 864) were received. Participants reacted favorably to the methodology; for some, it led to greater self-reflection about mealtime. Mother-child dyads usually ate dinner at the same time and often ate the same food. Children were frequently served protein and refined grains and were rarely served whole grains or fruit. Many families relied on convenience foods. CONCLUSIONS AND IMPLICATIONS: Digital food photography was feasible in this audience. Photos yielded a holistic picture of family dinnertime: meal timing, location, concordance in parent-child meals, level of preparation, and meal quality.

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BACKGROUND: Shared genetic and environmental factors suggest that family relationships are important predictors of obesity-related behaviors, yet little is known about how siblings influence physical activity and sedentary behaviors. This study examined physical activity and sedentary behavior between sibling dyads across summer and fall time points and determined if birth order and gender modify the relationship between sibling behaviors. METHODS: Mexican-heritage families residing in colonias along the United States-Mexico border were recruited using promotoras de salud to participate in summer and school year surveys. Eighty-seven sibling dyads had complete data for the physical activity sub-study: 21 older brother-younger brother, 21 older brother-younger sister, 23 older sister-younger brother, and 22 older sister-younger sister dyads. Physical activity and sedentary behavior were measured using a validated 7-day recall instrument to create summary measures of weekly active, moderate-to-vigorous physical activity (MVPA) metabolic equivalents (MET), sitting, and screen time minutes. We used linear regression analyses to examine changes over time and the association between older and younger sibling behavior. RESULTS: During summer, older siblings (mean age = 11.2 years) reported 1069 active minutes and 1244 sitting minutes per week; younger siblings (mean age = 8.3 years) reported 1201 active minutes and 1368 sitting minutes per week. Younger brothers reported fewer active minutes (mean = - 459.6; p = 0.01) and fewer MVPA MET-minutes (mean = - 2261.7; p = 0.02) of physical activity during the fall. Within all 87 dyads, older sibling physical activity was significantly associated with younger sibling active minutes (B = 0.45;p = 0.004) and MET-minutes (B = 0.45;p = 0.003) during summer but not fall; older sibling sedentary behavior was significantly associated with younger sibling sitting (B = 0.23;p = 0.01) and screen time minutes (B = 0.23;p = 0.004) during fall but not summer. After stratifying by gender dyad groups, younger brother behavior was strongly associated with older brother behavior at both time points. CONCLUSION: Younger siblings appear to emulate the physical activity behaviors of their older siblings during non-school summer months and sedentary behaviors of older siblings during school-time fall months, especially older brother-younger brother dyads. Family-based interventions to increase physical activity and decrease sedentary behavior are growing in popularity, but more work is needed to understand the role of sibling influences.

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Background: What lactating mothers eat flavors breast milk and, in turn, modifies their infants' acceptance of similarly flavored foods.Objective: We sought to determine the effects of the timing and duration of eating a variety of vegetables during breastfeeding on the liking of vegetables in both members of the dyad.Design: We conducted a randomized controlled study of 97 mother-infant dyads. Lactating mothers drank vegetable, beet, celery, and carrot juices for 1 mo beginning at 0.5, 1.5, or 2.5 mo postpartum or for 3 mo beginning at 0.5 mo postpartum. The control group drank equal volumes of water and avoided drinking the juices. Mothers rated the tastes of the juices and self-reported dietary intakes at each monthly visit (0.5-4.5 mo). After weaning, when 7.9 mo of age, infants' acceptance of plain, carrot-flavor (exposed flavor), and broccoli-flavor (nonexposed flavor) cereals was assessed on separate days.Results: The timing of exposure affected the acceptance of the carrot flavor that did not generalize to the novel broccoli flavor. A relatively brief experience (1 mo) with vegetable flavors in mothers' milk, starting at 0.5 mo postpartum, was sufficient to shift the hedonic tone, which resulted in a faster rate of eating carrot-flavored cereal than that in infants who were exposed during subsequent months or not at all. One month of exposure had a greater effect than 3 mo of exposure or no exposure. Regardless of when exposure occurred, infants were less likely to display facial expressions of distaste initially when eating the carrot cereal. Over time, mothers liked the tastes of carrot, beet, and celery juices more, but no changes in dietary intake of vegetables were observed.Conclusions: Early life may be an optimum time for both infants and their mothers to learn to like the taste of healthy foods. More research is needed to facilitate the liking and eating of these foods by mothers, which will, in turn, increase the likelihood of their feeding these foods to their children. This trial was registered at clinicaltrials.gov as NCT01667549.

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OBJECTIVE: Critical gaps remain in understanding optimal approaches to intervening with older couples. The focus of this report is to describe the pros and cons of incorporating spousal dyads into depression-prevention research. METHODS: In an intervention development study, the authors administered problem-solving therapy (PST) dyadically to participants with mild cognitive impairment (MCI) and their caregivers. Dyads worked with the same interventionist in the same therapy session. The dyadic PST (highlighted in a case example of a husband with MCI and his wife/support person) and the potential feasibility of the program are described. RESULTS: The authors found that the wife of the individual with MCI could be trained as a PST coach to help her husband learn and use problem-solving skills. A decrease in depressive symptom severity was observed for the individual with MCI, which was sustained over 12 months of follow-up. Neither the husband nor wife experienced an incident episode of major depression over the course of the study. CONCLUSION: Dyadic interventions need to be further developed in geriatric psychiatry; proven methods such as PST can be modified to include patients' support persons. Recommendations are offered for developing randomized controlled trials that aim to recruit dyads and prevent depression in at-risk older married couples.

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La respuesta sensible es una competencia materna ampliamente estudiada por su influencia en el desarrollo infantil y su asociación con las características de la madre, pero en menor medida se ha investigado su relación con las dificultades durante la gestación y el parto. El presente estudio busca identificar la influencia de las complicaciones perinatales sobre la sensibilidad materna en 90 diadas madre-hijo/a entre diez y catorce meses de edad de nivel socioeconómico alto, medio y bajo, residentes en Santiago de Chile. Se aplicó un cuestionario sociodemográfico y las diadas fueron filmadas en una situación de juego libre, la cual fue codificada con la Escala de Sensibilidad del adulto (E.S.A.). Los resultados muestran que la ausencia de complicaciones en el embarazo de la madre y la presencia de complicaciones en el parto, explican una mayor sensibilidad materna un año después. Se observa, además, una influencia significativa del nivel socioeconómico sobre la sensibilidad materna. Se discuten estos resultados y sus implicancias.

Sensitive response is a maternal competence widely studied for its influence in child development, and for its relationship with mother features, however, there is fewer research on its relationship to the difficulties of pregnancy and childbirth. This study seeks to identify the influence of adverse pregnancy outcome on maternal sensitivity in 90 dyads mother-child between ten and fourteen months age, of high, medium and low socioeconomic status, residents in Santiago, Chile. A sociodemographic questionnaire was taken to mothers, and dyads were filmed in a free play situation, which was coded with the Sensitivity Adult Scale (ESA). Results show that absence of difficulties during pregnancy on the mother, as well as presence of them during labor, explain a higher maternal sensitivity one year later. In addition, a significant influence of socioeconomic status on maternal sensitivity had been observed. These results and their implications are discussed.

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El objetivo del estudio fue examinar la efectividad de una estrategia de intervención con padres, basada en la perspectiva de la interacción social, a fin de disminuir los problemas de comportamiento infantil. Los participantes fueron 15 niños (11 niños y 4 niñas) con sus respectivas madres; las edades de los niños oscilaron entre los cinco y los ocho años, y el promedio de edad de las madres fue de 27.8 años. Se empleó un diseño experimental de caso único y se utilizaron procedimientos de enseñanza conductual como instrucciones, modelamiento, moldeamiento y retroalimentación visual. Se llevaron a cabo análisis de dependencias secuenciales y de secuencias temporales que son sensibles a los procesos de reforzamiento positivo y negativo que operan en las relaciones coercitivas. La intervención propició un aumento de la conducta prosocial en la madre y una disminución de la conducta aversiva infantil. Por otra parte, el cambio observado en la paternidad positiva parece mediar el cambio en los problemas de comportamiento infantil.

The aim of the study was to examine the effectiveness of an intervention strategy with parents, based on the perspective of social interaction, in order to decrease child behavior problems. Participants were 15 children (eleven boys and four girls) with their mothers. Children ages ranged from five to eight years, and the average age of mothers was 27.8 years. A single case experimental design was used and behavioral teaching procedures such as instructions, modeling, shaping and visual feedback were applied. Analysis of sequential dependencies and time sequences sensitive to processes of positive and negative reinforcement operating in coercive relationships were carried out. The suitable intervention increased prosocial behavior in mothers and decreased aversive behavior in children. Moreover, the observed change in positive parenting appears to mediate the change in child behavior problems.

O objetivo do estudo foi examinar a efetividade de uma estratégia de intervenção com pais, baseada na perspectiva da interação social, a fim de diminuir os problemas de comportamento infantil. Os participantes foram 15 crianças (11 meninos e 4 meninas) com suas respectivas mães; as idades das crianças oscilaram entre os cinco e os oito anos, e a média de idade das mães foi de 27.8 anos. Empregou-se um desenho experimental de caso único e utilizaram-se procedimentos de ensino condutual como instruções, modelamento, modelagem e retroalimentação visual. Foram feitas análises de dependências sequenciais e de sequências temporais que são sensíveis aos processos de reforço positivo e negativo que operam nas relações coercitivas. A intervenção propiciou um aumento da conduta pró-social na mãe e uma diminuição da conduta aversiva infantil. Por outro lado, a mudança observada na paternidade positiva parece mediar a mudança nos problemas de comportamento infantil.

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A covalently linked porphyrin-fullerene C60 dyad 5 was synthesized by 1,3-dipolar cycloaddition using 5-(4-formylphenyl)-10,15,20-tris[3-(N-ethylcarbazoyl)]porphyrin, N-methylglycine and fullerene C60. Methylation of 5 was used to obtain a cationic dyad 6. Spectroscopic properties were compared in toluene, N,N-dimethylformamide (DMF) and toluene/sodium bis(2-ethylhexyl)sulfosuccinate (AOT)/water reverse micelles. Absorption spectra of the dyads were essentially a superposition of the spectra of the porphyrin and fullerene reference compounds, indicating a very weak interaction between the chromophores in the ground state. The fluorescence emission of the porphyrin moiety in the dyads was strongly quenched by the attached fullerene C60 unit. The singlet molecular oxygen, O2((1)Δg), productions (ΦΔ) were strongly dependent on the solvent polarity. Similar ΦΔ values were obtained for 5,10,15,20-tetrakis[3-(N-ethylcarbazoyl)]porphyrin (TCP) in both solvents. Also, dyad 5 showed a high O2((1)Δg) generation in toluene. However, O2((1)Δg) production mediated by 5 considerably diminished in the more polar solvent DMF. Also, a high photodynamic activity involving O2((1)Δg) was found for both dyads in a simple biomimetic system formed by AOT reverse micelles. The photoinactivation ability of these dyads was investigated in Staphylococcus aureus cell suspensions. Photosensitized inactivation of S. aureus by dyad 6 exhibits a 4.5 log decrease of cell survival (99.997% cell inactivation), when the cultures are treated with 5 µM photosensitizer and irradiated with visible light (350-800 nm) for 30 min. Under these conditions, a lower photocytotoxic effect was found for 5 (3.2 log decrease). Furthermore, photoinactivation induced by 6 was higher than those obtained with the separate moieties of the dyad. Therefore, molecular structures formed by porphyrin-fullerene C60 dyads represent interesting photosensitizers to inactivate S. aureus.

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A violência entre irmãos é uma das formas mais comuns de violência familiar. Este estudo pretendeu caracterizar este problema em Portugal, numa amostra de 588 estudantes universitários. Os diferentes tipos de violência (física, psicológica e sexual) foram avaliados com as "Revised Conflict Tactics Scales - Sibling Version". Procedeu-se a análises descritivas exploratórias das distribuições das principais variáveis, recorreu-se ao teste do χ2 e a análises de covariância múltipla. Os resultados indicaram que a violência entre irmãos é muito frequente no início da adolescência; os rapazes perpetraram significativamente mais atos de violência física (p <0,001) e sexual (p <0,05) do que as raparigas, mas foram também, física (p <0,001) e sexualmente (p <0,05), mais vitimizados. Também as díades masculinas apresentaram níveis de violência física e sexual significativamente superiores aos de todas as outras díades, indicando claramente a reciprocidade do fenómeno. Os resultados foram discutidos segundo perspetivas de 'normalização de agressões' (dissonância cognitiva; Hardy, Beers, Burguess, & Taylor, 2010) e do 'ciclo de violência', as quais explicam a manutenção de comportamentos abusivos entre irmãos e a sua possível transferência para outras relações.(AU)

Sibling violence is one of the most common forms of family violence. This study aimed to characterize this issue in Portugal, among a sample of 588 undergraduates. The different types of victimization (physical, psychological and sexual) were assessed through the "Revised Conflict Tactics Scale - Sibling Version". Descriptive exploratory analyses of the main variables, χ2 test, and multiple analyses of covariance were conducted. The results indicated that sibling violence is more frequent during early adolescence; boys committed significantly more physical (p <.001) and sexual (p <.05) violent acts than girls, but they were also significantly more victimized than girls, both physically (p <.001) and sexually (p <.05). Also, the male dyads showed significantly higher levels of physical and sexual violence than all other dyads, indicating clearly the reciprocal phenomenon. The results are discussed according to 'normalization of aggression' and 'cycle of violence' perspectives, which both help to understand the perpetration of abusive behaviors among siblings, as well as their occasional transfer to other relationships.(AU)

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A violência entre irmãos é uma das formas mais comuns de violência familiar. Este estudo pretendeu caracterizar este problema em Portugal, numa amostra de 588 estudantes universitários. Os diferentes tipos de violência (física, psicológica e sexual) foram avaliados com as "Revised Conflict Tactics Scales - Sibling Version". Procedeu-se a análises descritivas exploratórias das distribuições das principais variáveis, recorreu-se ao teste do χ2 e a análises de covariância múltipla. Os resultados indicaram que a violência entre irmãos é muito frequente no início da adolescência; os rapazes perpetraram significativamente mais atos de violência física (p <0,001) e sexual (p <0,05) do que as raparigas, mas foram também, física (p <0,001) e sexualmente (p <0,05), mais vitimizados. Também as díades masculinas apresentaram níveis de violência física e sexual significativamente superiores aos de todas as outras díades, indicando claramente a reciprocidade do fenómeno. Os resultados foram discutidos segundo perspetivas de 'normalização de agressões' (dissonância cognitiva; Hardy, Beers, Burguess, & Taylor, 2010) e do 'ciclo de violência', as quais explicam a manutenção de comportamentos abusivos entre irmãos e a sua possível transferência para outras relações.

Sibling violence is one of the most common forms of family violence. This study aimed to characterize this issue in Portugal, among a sample of 588 undergraduates. The different types of victimization (physical, psychological and sexual) were assessed through the "Revised Conflict Tactics Scale - Sibling Version". Descriptive exploratory analyses of the main variables, χ2 test, and multiple analyses of covariance were conducted. The results indicated that sibling violence is more frequent during early adolescence; boys committed significantly more physical (p <.001) and sexual (p <.05) violent acts than girls, but they were also significantly more victimized than girls, both physically (p <.001) and sexually (p <.05). Also, the male dyads showed significantly higher levels of physical and sexual violence than all other dyads, indicating clearly the reciprocal phenomenon. The results are discussed according to 'normalization of aggression' and 'cycle of violence' perspectives, which both help to understand the perpetration of abusive behaviors among siblings, as well as their occasional transfer to other relationships.

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Este trabajo aborda experimentalmente el estudio de los intercambios equitativos en una tarea en la que doce díadas de estudiantes de licenciatura en psicología asignaban a su compañero uno de tres posibles "juegos" asociados con requisitos diferenciales de un programa de reforzamiento de razón variable (RV: 5, 10 o 20). En una segunda condición, los participantes asignaban también la cantidad de puntos que obtendría su pareja (1, 2 o 4 puntos) con cada requisito de razón. Se programaron dos clases de sesiones: con información o sin información de la asignación de juego que hacían los compañeros en cada ensayo. Para evaluar las estrategias utilizadas se empleó el modelo Aristotélico de la Equidad (Adams, 1965; Anderson, 1976), mismo que describió adecuadamente la razón de esfuerzo y ganancias en los intercambios bajo la condición de información. Se discuten aquellas estrategias diádicas que resultaron en una distribución de mayor cantidad de ganancias con el menor esfuerzo posible, así como aquellas que produjeron distribuciones asimétricas de ganancias y esfuerzo, lo que desencadenó ganancias relativamente reducidas a lo largo de las sesiones. Especial énfasis recibe la discusión del mecanismo de reciprocidad en el intercambio social.

This paper deals with the experimental study of equitable interchanges in a task where 12 dyads of psychology students assigned their partners one of three games associated with different values of a variable ratio schedule of reinforcement (VR: 5, 10 or 20). In a second condition, subjects also assigned the number of points (1, 2 or 4 points) that their partners could obtain after completing the VR response criteria. Two types of sessions were programmed in which the information about task allocation and point's assignment was either present or absent. The Aristotelic model of Equity was used (Adams, 1965; Anderson, 1976) to evaluate the interchange strategies, and to describe the ratio of effort and profits in the interchanges under the information condition. The patterns of dyadic strategies that maximized profits and minimized effort were analyzed. The reciprocity mechanism in social interchange is discussed.

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Pollen morphology of neotropical species of Podostemum (Malpighiales: Podostemaceae). Pollen morphology of neotropical species of Podostemum is described for the first time with light (LM) and scanning electronic microscopes (SEM), using pollen dehydration by critical point. Herbarium specimens under study are P. comatum, P. distichum, P. muelleri and P. rutifolium. Pollen grains are dispersed in dyads. Observed with LM, dyads range from 21 to 31μm in lengh and 12 to 18μm wide. Individual pollen grains are radially symmetrical spheroidal to subprolate, and have a tricolpate aperture. The exine is tectate, psilate, with an infratectal structure formed by simple columella under the tectum. With SEM, an abundant pollen surface coat is observed all over the pollen grains, mainly in the two grains dyad contact zone. This pollen coat would protect the grains from dehydration because the environments in which these plants grow have important water variation and pollination is not zoophilic. The shared dyad wall shows bridges that partially fusion the exines, forming calymate dyads. Some dyads bear the apertures aligned between grains and some not. The transverse condition of the aperture or aperture in "L" that occurs in the four studied species is described for the first time. It is interpreted as a trend of the genus to espiroaperture. This change in the aperture would be associated with phenology because it is a genus with very short flowering and anthesis, generally a day of anthesis in the dry season. The spiroaperture increases the chances of germination sites and would also have a harmomegata role in an environment with water changes favoring the reproductive success.Walls have a microechinate sculpture, with or without pads at the base of the microechinae. Size of ornamental processes differs, and the colpus membrane has similar ornamentation to that of the non apertural wall, but with larger processes. Individual morphology of pollen grains is similar to that described for other family genera as Apinagia and Mourera. During previous stages of anthesis, the presence of cross tetrads was observed, also a new contribution for this genus. Rev. Biol. Trop. 58 (1): 81-88. Epub 2010 March 01.

La morfología del polen de cuatro especies neotropicales del género Podostemum (Podostemaceae) se describe aquí por primera vez mediante microscopía de luz y electrónica de barrido, utilizando material deshidratado en punto crítico. Se analizaron ejemplares de P. comatum, P. distichum, P. muelleri y P. rutifolium. Los granos de polen son dispersados en díades. Se encuentra abundante cobertura polínica, principalmente en la zona de contacto entre los dos granos de la díada. En la pared compartida entre los granos se presentan puentes de ectexina que fusionan parcialmente las exinas. Los granos individuales son radialmente simétricos y tricolpados. En algunas díades las aberturas están alineadas entre los granos y en otras no. Se describe por primera vez la condición abertura transversal, que fue observada en las cuatro especies estudiadas, y que se interpreta como tendencia del género a espiroabertura. La escultura de la exina es microequinada con mamelones en la base. Los procesos ornamentales son de diferente tamaño. La membrana del colpo tiene una ornamentación similar a la pared adyacente del grano, pero los procesos tienen mayor tamaño. Se observaron tétrades decusadas en las etapas previas a la antesis, un dato hasta el momento no registrado para el género.

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A linguagem é considerada um instrumento de mediação simbólica que caracteriza a espécie humana e é fundamental nas trocas interpessoais e na internalização dos processos constituídos nessas trocas. Neste artigo foram descritas contribuições teóricas acerca do desenvolvimento da linguagem, e o papel da fala do adulto nesse processo. O modelo de Roman Jackobson foi adotado para análise de características pragmáticas da fala materna. Foram transcritas e analisadas as falas maternas em 40 díades, em dois momentos do desenvolvimento do bebê (30 dias e 5 meses). Foram ainda analisados os aspectos afetivos e cognitivos dessa linguagem. Os resultados mostraram uma predominância da função fática em ambas as faixas etárias. Houve também predominância dos aspectos afetivos em relação aos cognitivos. Acredita-se que o conhecimento das características da fala materna em etapas iniciais do desenvolvimento e a identificação dos aspectos pragmáticos, que podem colaborar para o desenvolvimento da linguagem infantil, são de especial relevância.

Language is considered an instrument of symbolic mediation that characterizes the human species, involved in interpersonal exchanges and internalization of the processes that are constructed in these exchanges. In this article the theoretical contributions and conceptions about language development were described, and the role of adults’ speech in this process. Roman Jackobson’s model of was adopted for the analyses of pragmatic characteristics of mothers’ speech. Mothers’ talk of 40 dyads were transcribed and analyzed in two moments of the babies’ development (30 days and 5 months). The affective and cognitive aspects of maternal language were also analyzed. The results indicated the predominance of phatic function in both age groups. Affective aspects were also more frequent in relation to cognitive ones. Knowledge about maternal and child language characteristics at the initial stages of development, and the identification of its pragmatic aspects that can contribute for child language development are relevant.

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