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Objective: To examine the sex difference in the emotional processing of adolescents with elevated callous unemotional (CU) trait. Methods: A total of 770 middle school students completed the inventory of Callous-Unemotional Traits (ICU). According to the prevalence of psychopathy in the general population, the top 5％ and the last 5％ of ICU scores were selected as higher and lower CU trait groups. Finally, 33 students in each group participated in the experiment, including 27 males and 39 females. In the facial expression recognition task, the participants were presented with happy, neutral, sad and fear facial expressions and were asked to identify these four facial expressions. Accuracy and response time were recorded as dependent variables and were analyzed by repeated ANOVA. Results: The accuracy of males was lower than that of females [ (73. 3 ± 22. 1) ％ vs. (81. 6 ± 16. 2) ％, P ＜ 0. 05] and the response time of males was shorter than that of females [ (850 ± 236) ms vs. (939 ± 158) ms, P ＜ 0. 05]. Moreover, when identifying fear emotions, compared to lower CU trait males, the males with higher CU trait had lower accuracy [ (60. 4 ± 24. 6) ％vs. (86. 0 ± 10. 1) ％, P ＜ 0. 01], whereas the difference of the response time between the males with higher and lower CU trait was not significant. While between higher and lower CU trait females, the accuracy and response time were not significantly different. When identifying other emotions, there was no significant difference in the accuracy and response time between higher and lower CU trait groups of both males and females. Conclusion: The higher callous unemotional trait adolescent males may display deficits in processing fear emotions, but adolescent females with higher callous unemotional trait can accurately recognize fear emotion.

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AIMS: To investigate the online activities, prevalence of Internet Addiction in relation to demographic characteristics and risk factors related to family and school among adolescents. METHODS: A total of 6468 10-18 year old adolescents recruited from local schools in Guangzhou, China were selected by adopting multi-stage stratified random sampling (female/male: 2886/3582; mean age:13.78 ± 2.43). Participants completed a structured questionnaire. RESULTS: The overall prevalence of Internet Addiction was 26.50%, with severe addiction being 0.96%. Internet Addiction was higher among males than females (30.6% versus 21.2%). Older grade students reported more Internet addiction rate (χ2 = 431.25, P < 0.001). The five highest-ranked online activities were social networking (94.73%), school work (86.53%), entertainment (82.44%), Internet gaming (73.42%) and shopping online (33.67%). A negative relationship with teachers (OR: 1.35, 95% CI: 1.20-1.53), a negative relationship between two parents (OR: 1.23, 95% CI: 1.18-1.37), and poor academic performance (OR: 1.22, 95% CI: 1.17-1.35), showed the highest relative risks for Internet addiction. CONCLUSIONS: Severe Internet Addiction is not common, but mild Internet addiction was reported by more than one fourth of all participants. The rates of Internet Addiction varied by gender, grade, the quality of family relationships and school situation, suggesting these factors should be considered when designing and implementing interventions.

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Multiple-choice items are wildly used in psychological and educational test. The present study investigated that if a multiple-choice item have an advantage over a dichotomous item on ability or latent trait evaluation. An item response model, 2-parameter logistic nested logit model (2PL-NLM), was used to fit the multiple-choice data. Both simulation study and empirical study indicated that the accuracy and the stability of ability estimation were enhanced by using multiple-choice model rather than dichotomous model, because more information was included in multiple-choice items’ distractors. But the accuracy of ability estimation showed little differences in four-choice items, five-choice items and sixchoice items. Moreover, 2PL-NLM could extract more information from low-level respondents than from high-level ones, because they had more distractor chosen behaviors. In the empirical study, respondents at different trait levels would be attracted by different distractors from the Chinese Vocabulary Test for Grade 1 by using the changing traces of distractor probabilities calculated from 2PL-NLM. It is suggested that the responses of students at different levels could reflect the students’ vocabulary development process (AU)

Los items de elección múltiple se han usado ampliamente en tests psicológicos y educativos. Este estudio investiga si los items de elección múltiple tiene ventajas sobre los items dicotómicos o sobre la evaluación de rasgo latente. Un modelo de respuesta al item, con un modelo logit anidado, logístico 2-parámetros (2PL-NKM), fue usado para ajustar los datos de elección múltiple. Los estudios de simulación y empíricos indicaron que la precisión y la estabilidad de la estimación de capacidad mejoró usando el modelo de elección múltiple en contraposición al modelo dicotómico, debido a la mayor información incluida en los items distractores de la elección múltiple. Pero la precisión y la capacidad de estimación mostró peque- ñas diferencias en items de cuatro elecciones, cinco y seis elecciones. Además, el modelo 2PL-NLM puede extraer más información respondientes de bajo nivel que de los de alto nivel, debido a que tienen conductas de elección con más distractores. En el estudio empírico, los respondientes en diferentes niveles de rasgo fueron atraídos por diferentes distractrores del Test de Vocabulario chino en el primer grado, usando trazos cambiantes en la probabilidad de distractor a partir de 2PL-NLM. Esto sugiere que las respuestas de los estudiantes a diferentes niveles puede reflejar un proceso evolutivo de vocabulario en los estudiantes (AU)

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Objective To explore the latent class structure and heterogeneity of posttraumatic stress disorder(PTSD) in adolescent.Methods The Chinese PTSD Checklist-Civilian Version (PCL-C) was used to assess 560 adolescent from the Wenchuan earthquake area.Latent Class Model was employed to analyze the data.Results Latent Class Analysis revealed four classes of adolescent PTSD sample:pervasive disturbance (n=115,20.5％),no disturbance (n=165,29.5％),Intermediate Symptom with high Emotional Numbing (n=188,33.6％),as well as Intermediate Symptom with low avoidance (n=92,16.4％).The proportion of boys in each subsample were 55.7％,49.7％,50.5％ and 50.4％,respectively.In addition,there was no significant gender difference of prevalence within each class (x2=1.56,P=0.669).Conclusions Four-class model best fit the data for PTSD symptoms,and different clinical intervention should be adopted.

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Objective To test psychometric properties of the PTSD checklist-civilian version(PCL-C) among junior school students from earthquake-hit region.Methods PC L-C Chinese Version, Rosenberg self-esteem scale and SCL-90 were utilized to assess 560 junior school students from earthquake-hit region.Results Firstly,the internal consistency of the total scale and three subscales were qualified, the coefficient alphas were 0.890,0.734,0.789 and 0.722, respectively; 307 participants, from the first samples, engaged in the second test two months after the first assessment.The test-retest stability was re-experiencing 0.40(P ＜ 0.01 ) ,avoidance 0.45 (P＜ 0.01 ), hyper-arousal 0.448 (P ＜ 0.01 ), total scale 0.535 (P ＜ 0.01 ), respectively.Secondly, the results of criteria validity showed PCL-C and its three subscales had negative correlation with self-esteem (r =-0.192 ～-0.299, P ＜ 0.01 ), and had positive-related with SCL-90 and its subscales of depression, anxiety, and psychotic (r=0.563 ～0.775, P＜0.01 ).Finally,the results of empirical validity revealed that based on the score on PCL-Ccould differentiate those people who have significant different scores on SCL-90.Conclusions The PCL-C hadgood reliabilities and validities,which could be used to assess the severity of PTSD.

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Objective: The aim of the research was to test the applicability of Chinese Meaning in Life Questionnaire (C-MLQ) and its reliability and validity in college students. Methods: C-MLQ and a parcel of scales were administered to 531 college students from three universities in China. Exploratory Factor Analysis (EFA) and confirmatory factor analysis (CFA) were employed to check the construct validity. Results: Firstly, the internal consistency of the two subscales were qualified, the coefficient alpha of two subscales were 0.85 and 0.82 respectively; test-retest reliability were 0.74 and 0.76 respectively; secondly, compared with original scales, the construct of C-MLQ also had two factors, the item factor loadings ranging from 0.61 to 0.78 on the factor it belonged to. Thirdly, the correlations of C-MLQ and criterion measurement were 0.025 to 0.637. Finally, there were no gender difference in the scores of two subscales. Conclusion: The CMILQ has good reliability and validity and it can be used to assess individual meaning in life.

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Objective: The purpose of the current research was to explore the relationship between delay behavior and time perspective of college students. Methods: 456 college students (including 135 graduate students), from four Chinese universities, were surveyed with Aitken Procrastination Inventory (API) and Time Perspective Scale for Adolescent. Results: Firstly, there didn’t exist significant difference between different genders and grades; secondly, the scores of API were significantly correlated with length factor of Future Time Perspective (r=0.55, P

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Objective: To investigate the factor structure of the PTSD through analyzing the factor structure of the PTSD Checklist in adolescents from earthquake disaster region. Methods: Chinese PTSD Checklist-Civilian Version was used to assess 560 adolescents, and technique of Confirmatory Factor Analysis (CFA) was employed to comparing seven competitive models. Results: The intercorrelated four-factor model was the best fit one. Conclusion: The Chinese PTSD Checklist-Civilian has an intercorrelated four-factor model; intercorrelated four-factor model of the PTSD may fit the Chinese people, however, which needs further confirmation.