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Early substance use initiation among children represents a significant risk to public health. Research suggests that early positive perceptions and cognitions of elementary students toward substance use may predict later use during adolescence. Studies among adolescent populations have shown an inverse relationship between substance use and risk perceptions. To gain insight into alcohol, tobacco, and marijuana risk perceptions prior to adolescence, we analyzed data from the Chilean Early Childhood Longitudinal Survey (ELPI). In a sample of 5,278 families (mean age of preadolescents 10.63 years, SD = .64; 50.5% males), our findings showed that an important proportion of Chilean 10 years old did not perceive occasional tobacco, alcohol, or marijuana use to be high-risk activities. However, the majority of respondents did consider daily substance use to be a high-risk activity, with some variation across substances. Overall, older preadolescents were more likely to consider substance use to be less risky compared to their slightly younger counterparts. Our analysis also demonstrated that past month substances use by caregivers were all found to be predictive of low-medium risk perceptions among preadolescents surveyed, while conversely, caregivers' negative reactions to finding out their child had used a substance decreased the likelihood of holding low-medium risk perceptions. Individuals from single-parent households were less likely to consider substance use as being high-risk compared to their peers. Preadolescents with caregivers reporting higher average incomes were also more likely to hold lower risk perceptions of occasional substance use. Implications for public policies to prevent substance use in the pre-adolescent population are discussed.

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Los bebés exhiben una amplia gama de comportamientos prosociales, que incluyen ayudar, compartir, consolar y cooperar. En la infancia, estos comportamientos se vuelven más sofisticados y socialmente apropiados. El objetivo de esta investigación es identificar y revisar sistemáticamente la literatura que ha incorporado el estudio de la figura paterna y su impacto en el desarrollo de la conducta prosocial en los niños/as entre los 0 y 5 años. Método, utilizando la metodología PRISMA, se realiza una búsqueda y análisis de artículos científicos en las bases de datos Scopus y Web of Science, considerando criterios de inclusión y exclusión establecidos. Resultados, se seleccionaron 28 artículos y el análisis de sus resultados indica que el padre tiene un impacto en el desarrollo de la conducta prosocial de los niños entre los 0 y 5 años. El ejercicio del rol paterno y el apoyo entregado por el padre, favorece que el niño/a manifieste conductas prosociales desde la infancia temprana, en la relación con sus figuras significativas y con terceros, de forma directa e indirecta, en los distintos contextos de socialización.

Infants exhibit a wide range of prosocial behaviors, including helping, sharing, comforting, and cooperating. In infancy, these behaviors become more sophisticated and socially appropriate. The aim of this research is to systematically identify and review the literature that has incorporated the study of the father figure and its impact on the development of prosocial behavior in children aged 0-5 years. Method, using the PRISMA methodology, a search and analysis of scientific articles in the Scopus and Web of Science databases was carried out, considering established inclusion and exclusion criteria. Results, 28 articles were selected and the analysis of their results indicates that fathers have an impact on the development of prosocial behavior in children between 0 and 5 years of age. The exercise of the paternal role and the support provided by the father, favors the child to manifest prosocial behaviors from early childhood, in the relationship with their significant figures and with third parties, directly and indirectly, in the different socialization contexts.

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Resumen (analítico) Este estudio piloto tuvo por objetivo conocer los vínculos de apego en niños y niñas que asisten a salas cuna. Se aplicó la Escala de apego durante estrés (ADS) a 25 díadas madre-infante (cuyos niños y niñas tenían entre 10 y 14 meses de edad), que asistían a salas cuna en la ciudad de Punta Arenas. La muestra fue no probabilística intencional, mientras que el diseño no experimental, transversal, descriptivo. Los resultados indican que la distribución de los tipos de apego es similar al patrón universal; sin embargo, una prolongada estadía en salas cuna se asocia a un mayor riesgo de apego inseguro aun cuando los efectos de la edad de ingreso son controlados. Se discuten los alcances e implicancias para futuras investigaciones.

Abstract (analytical) This pilot study had the objective of determining the distribution of attachment among children who experience early entry to daycare centers. The Attachment During Stress scale was implemented with 25 baby-mother dyads whose children were aged between 10 and 14 months old and were attending daycare centers in the city of Punta Arenas. The study used a deliberate non-probabilistic sample and it is a non-experimental, descriptive study. The results show that the distribution of attachment was similar to the universal pattern. However, a long period of time attending a daycare center is associated with a higher risk of insecure attachment even the effects of early entry are controlled. Implications and possibilities for future studies are also discussed.

Resumo (analítico) Este estudo piloto teve com objetivo conhecer os vínculos de apego em crianças que frequentam creches. Foi aplicada a Escala de Apego durante Stress (ADS) a 25 duplas materno - infante, cujas crianças estavam na faixa etária entre 10 a 14 meses de idade que frequentavam creches na cidade de Punta Arenas. A amostra foi não probabilística intencional e o desenvolvimento não experimental, transversal, descritivo. Os resultados indicam que a distribuição dos tipos de apego são similares ao padrão universal; contudo, a permanência prolongada em creches pode estar associada a um risco maior de apego inseguro mesmo quando os efeitos da idade de ingresso na creche são controlados. São discutidos os alcances e implicâncias para pesquisas futuras.

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Resumen La escala Massie-Campbell de Apego Durante Estrés (ADS; 1983), es una guía de observación de la interacción entre madres (o cuidadores) y sus hijos de 6 a 18 meses. Este estudio busca obtener evidencias de validez de constructo (convergente y divergente) y de criterio (sensibilidad, especificidad y valores predictivos) de dicho instrumento. Para ello, se evaluó el apego en 32 niños y niñas de ocho a diez meses de Lima, Perú, utilizando el ADS y el Attachment Q-set 3.0 (AQS), de Waters (1995), así como la sensibilidad de sus madres. Como resultado, se encontró que las clasificaciones del apego seguro e inseguro dadas a partir del ADS se encuentran relacionadas con los puntajes continuos de seguridad del apego del AQS (r = .41, p = .02) y con las clasificaciones dicotómicas (seguro vs. inseguro) obtenidas a partir del mismo [χ2 (1, N = 32) = 4.69, p = .03, d = .83]. Adicionalmente, no se hallaron diferencias significativas en la sensibilidad materna de las madres de los niños clasificados como seguros y la de los inseguros. Dado que la sensibilidad de la escala ADS no alcanzó niveles satisfactorios (33.3 %, IC 95 % = [15.48; 56.90]), de manera exploratoria se evaluó un punto de corte de cinco conductas seguras, el cual mejora su sensibilidad (47.6 %, IC 95 % = [26.4; 69.7]) y mantiene sus niveles satisfactorios de especificidad (90.9 %, IC 95 % = [57.1; 99.5]). En conclusión, el instrumento muestra adecuadas evidencias de validez de constructo convergente, pero no divergente; y, al ser considerado un instrumento de tamizaje, su sensibilidad, especificidad y valores predictivos necesitan seguir siendo estudiados con el fin de conseguir un punto de corte con mayor validez.

Resumo A Escala Massie-Campbell de Apego durante o Stress (ADS; 1983) é um guia de observação da interação entre mães (ou cuidadores) e seus filhos de 6 a 18 meses. Este estudo procura obter evidências de validade de constructo (convergente e divergente) e de critério (sensibilidade, especificidade e valores preditivos) desse instrumento. Para isso, foi avaliado o apego em 32 crianças de oito a dez meses, de Lima, Peru, utilizando o ADS e o Attachment Q-set 3.0 (AQS), de Waters (1995), bem como a sensibilidade de suas mães. Como resultados, constatou-se que as classificações do apego seguro e inseguro dadas a partir do ADS se encontram relacionadas com as pontuações contínuas de segurança do apego do AQS (r = .41, p = .02) e com as classificações dicotômicas (seguro versus inseguro) obtidas a partir deste [χ2 (1, N = 32) = 4.69, p = .03, d = .83]. Além disso, não foram encontradas diferenças significativas na sensibilidade materna das mães das crianças classificadas como seguras e a das inseguras. Tendo em vista que a sensibilidade da escala ADS não atingiu níveis satisfatórios (33.3 %, IC 95 % = [15.48; 56.90]), de maneira exploratória, foi avaliado um ponto de corte de cinco comportamentos seguros, o que melhora sua sensibilidade (47.6 %, IC 95 % = [26.4; 69.7]) e mantém seus níveis satisfatórios de especificidade (90.9 %, IC 95 % = [57.1; 99.5]). Em conclusão, o instrumento mostra adequadas evidências de validade de constructo convergente, mas não divergente; e, ao ser considerado um instrumento de rastreamento, sua sensibilidade, especificidade e valores preditivos precisam continuar sendo estudados a fim de conseguir um ponto de corte com maior validade.

Abstract The Massie-Campbell Attachment During Stress Scale (ADS, Massie & Campbell, 1983) is an observation guide of the interactions between mothers (or caretakers) and children from 6 to 18 months. This study sought the construct validity (convergent and discriminant) of ADS, as well as its criterion validity (sensitivity, specificity, and predictive values). To that end, child attachment was measured in a group of 32 children aged 8 to 10 months from Lima, Peru using ADS and Attachment Q-set 3.0 (AQS, Waters, 1995). Maternal sensitivity was assessed as well. It was found that ADS attachment classifications were related with AQS attachment security continuous scores (r = .41, p = .02) and with its dichotomous classifications [secure vs. insecure; χ2 (1, N = 32) = 4.69, p = 0.03, d = 0.83]. Additionally, no significant differences between the ADS's maternal sensitivity of mothers with children classified as secure and mothers with children classified as insecure were found. Since ADS´s sensitivity did not reach satisfactory levels (33.3 %, 95 % CI = [15.48, 56.90]), a cut-off point of 5 secure behaviors was used, which improved its sensitivity (47.6 %, 95 % CI = [26.4; 69.7]) while maintaining satisfactory levels of specificity (90.9 %, 95 % CI = [57.1; 99.5]). The instrument shows adequate convergent validity but lacks evidence of discriminant validity. Further exploration of ADS's sensitivity, specificity, and predictive values is recommended in order to obtain a cut-off point with greater validity, given that the instrument is considered a screening test.

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Mapuche represents the largest indigenous group in Chile amounting to nearly 10% of the total population. In a longitudinal cohort of 12,398 children, we analyzed the role of ethnicity in physical and psychosocial development of Mapuche and nonindigenous Chilean toddlers (age 2.5 years), taking into account sociodemographic and caregiver characteristics. As indicated by our univariate analysis, the Mapuche developmental niche was characterized by lower income, lower maternal education, poorer quality of the home environment, longer breastfeeding, and higher parental stress. Physical development showed higher body mass index. Mapuche children showed less externalizing problems. We then analyzed the incremental contribution of ethnicity in a series of hierarchical regressions with the second wave of developmental measurements (age 4.5 years) as outcome variables, showing a significant but modest incremental contribution of ethnicity to the prediction of children's development between 2.5 and 4.5 years of age. Controlling for environmental variables, Mapuche showed less externalizing and internalizing, behavior problems. Socioeconomic status, quality of the home environment, and parenting stress were stronger predictors of socioemotional development than ethnicity per se.

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Preschoolers' vocabulary acquisition sets the stage for later reading ability and school achievement. This study examined the role of socioeconomic status (SES) and the quality of the home environment of seventy-seven Chilean majority and Mapuche minority families from low and lower-middle-class backgrounds in explaining individual differences in vocabulary acquisition of their three-and-a-half-year-old children. Additionally, we investigated whether the relation between SES and receptive and expressive vocabulary was mediated by the quality of the home environment as the Family Investment Model suggests. The quality of the home environment significantly predicted receptive and expressive vocabulary above and beyond ethnicity, SES, parental caregiver status, and quantity of daycare. Furthermore, the quality of the home environment mediated the relation between SES and expressive and receptive vocabulary acquisition.

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This article discusses significant changes in childcare policy and practice in Chile. We distinguish four specific periods of childcare history: child abandonment and the creation of foundling homes in the 19th century; efforts to reduce infant mortality and the creation of the health care system in the first half of the 20th century; an increasing focus on inequality and poverty and the consequences for child development in the second half of the 20th century; and, finally, the current focus on children's social and emotional development. It is concluded that, although Chile has achieved infant mortality and malnutrition rates comparable to those of developed countries, the country bears the mark of a history of inequality and is still unable to fully guarantee the health of children from the poorest sectors of society. Recent initiatives seek to improve this situation and put a strong emphasis on the psychosocial condition of children and their families.

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This article discusses significant changes in childcare policy and practice in Chile. We distinguish four specific periods of childcare history: child abandonment and the creation offoundling homes in the 19th century; efforts to reduce infant mortality and the creation of the health care system in the first half of the 20th century; an increasing focus on inequality andpoverty and the consequences for child development in the second half of the 20th century; and, finally, the current focus on children’s social and emotional development. It is concluded that, although Chile has achieved infant mortality and malnutrition rates comparable to those of developedcountries, the country bears the mark of a history of inequality and is still unable to fully guarantee the health of children from the poorest sectors of society. Recent initiatives seek to improve this situation and put a strong emphasison the psychosocial condition of children and their families. (AU)

El artículo discute cambios significativos en políticasy prácticas del cuidado infantil en Chile.Se distinguen cuatro períodos históricos en loscuidados infantiles con las siguientes características:abandono infantil y la creación de lacasa de expósitos en el siglo XIX; esfuerzos pordisminuir la mortalidad infantil y la introducciónde un sistema de salud en la primera mitaddel siglo XX; un incremento en la atención dela desigualdad y la pobreza y sus consecuenciaspara el desarrollo infantil en la segunda mitaddel siglo XX; y finalmente, una focalización en eldesarrollo socioemocional de los niños. Se concluyeque, aunque Chile ha alcanzado niveles demortalidad infantil y desnutrición comparablesa países desarrollados, todavía queda la marcade una historia de desigualdades que no permitegarantizar completamente la salud de los niñosmás pobres. Recientes iniciativas tratan de mejoraresta situación y ponen un fuerte énfasis enlas condiciones psicosociales de los niños y susfamilias. (AU)

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OBJECTIVES/HYPOTHESIS: Our goal was to assess the impact of personal music players, earphones, and music styles on output, the subject's preferred listening levels, and outline recommendations for the prevention of music-induced hearing loss. STUDY DESIGN: Experimental study. Personal music players' output capabilities and volunteers' preferred output levels were assessed in different settings. Based on current noise-induced hearing loss exposure limits, recommendations were outlined. METHODS: On three different devices and earphone types and 10 music styles, free field equivalent sound pressure output levels were assessed by applying a microphone probe inside the auditory canal. Forty-five hearing-healthy volunteers were asked to select preferred listening levels in different background noise scenarios. RESULTS: Sound pressure output reached 126 dB. No difference was found between device types, whereas earbud and supra-aural earphones showed significantly lower outputs than in-ear earphones (P < .001). Three distinct music style groups were identified with as much as 14.4 dB difference between them. In silence, 17.8% of volunteers spontaneously selected a listening level above 85 dB. With 90 dB background noise, 40% selected a level above 94 dB. Earphone attenuation capability was found to correlate significantly with preferred level reductions (r = 0.585, P < .001). In-ear and especially supra-aural earphones reduced preferred listening levels the most. CONCLUSIONS: Safe-use recommendations were outlined, whereas selecting the lowest volume setting comfortable remained the main suggestion. High background noise attenuating earphones may help in reducing comfortable listening levels and should be preferred. A risk table was elaborated, presenting time limits before reaching a risky exposure.

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