A diffusion model analysis of the effects of aging in the lexical-decision task

The effects of aging on response time (RT) are examined in 2 lexical-decision experiments with young and older subjects (age 60-75). The results show that the older subjects were slower than the young subjects, but more accurate. R. Ratcliff s (1978) diffusion model provided a good account of RTs, their distributions, and response accuracy. The fits show an 80-100-ms slowing of the nondecision components of RT for older subjects relative to young subjects and more conservative decision criterion settings for older subjects than for young subjects. The rates of accumulation of evidence were not significantly different for older compared with young subjects (less than 2% and 5% higher for older subjects relative to young subjects in the 2 experiments).     

Assessing model mimicry using the parametric bootstrap

We present a general sampling procedure to quantify model mimicry, defined as the ability of a model to account for data generated by a competing model. This sampling procedure, called the parametric bootstrap cross-fitting method (PBCM; cf. Williams (J. R. Statist. Soc. B 32 (1970) 350; Biometrics 26 (1970) 23)), generates distributions of differences in goodness-of-fit expected under each of the competing models. In the data informed version of the PBCM, the generating models have specific parameter values obtained by fitting the experimental data under consideration. The data informed difference distributions can be compared to the observed difference in goodness-of-fit to allow a quantification of model adequacy. In the data uninformed version of the PBCM, the generating models have a relatively broad range of parameter values based on prior knowledge. Application of both the data informed and the data uninformed PBCM is illustrated with several examples.     

Internal attribution of outcome moderates the cortisol response to a cooperative task in women

Several ethological reports have indicated that cooperative behaviors play an adaptive role. However, research has focused on competition in men, and there have been few studies on cooperation. This study aims to analyze the cortisol and psychological responses in women to a cooperative situation compared with a competitive situation in a laboratory context. The sample was distributed into four groups depending on the task and the outcome obtained: Positive cooperation, negative cooperation, competition with victory, and competition with defeat. Our results show that, in comparison with competition, cooperation produces different effects in cortisol, but not in psychological states. Nevertheless, these effects occur only when the task outcome and its appraisal are considered. Only the participants who cooperated and obtained a positive outcome and those who competed and lost showed significant decrements of cortisol. Internal attribution was higher in groups with more stable cortisol levels, suggesting a possible modulator effect of controllability in the way the situation was experienced. These results could be generalized to situations in which negotiation, mediation, and cooperative strategies are relevant for making decisions and/or solving problems.     

When is Parental Suppression of Black Children’s Negative Emotions Adaptive? The Role of Preparation for Racial Bias and Children’s Resting Cardiac Vagal Tone

Research on Child and Adolescent Psychopathology - Research demonstrates that Black parents attempt to suppress children’s expressions of negative emotions (e.g., anger, fear), in part, to...     

A Cyberbullying Intervention for Hong Kong Chinese College Students

A cyberbullying intervention was developed and empirically tested with 137 Hong Kong Chinese College students. The intervention was designed to change students’ attitudes about cyberbullying behavior and increase their awareness of cyberbullying. Participants were assigned to an experimental or control group. They completed questionnaires before the intervention (Time 1; T1), immediately after the intervention (Time 2; T2), and again eight weeks later (Time 3; T3). The experimental group participated in a 1-h intervention where they were presented with a simulated Facebook page showing the helpless feelings of cyber-victims, watched video clips of the consequences of cyberbullying, and engaged in small group discussions and a self-reflection writing task. Results showed that participants who received the intervention experienced an increase in their awareness and had more negative attitudes toward cyberbullying (i.e., the perception that cyberbullying is unacceptable behavior) than did the control group. In addition, those who reported being highly engaged in the intervention maintained the positive effects at the 8-week follow-up. The results demonstrate the feasibility and effectiveness of a short-term cyberbullying intervention for college students and that level of participant engagement contributes to its effectiveness.     

Validation of the Sexual Sensation Seeking Scale in Spanish Samples

The aim of this study was to validate the Sexual Sensation Seeking Scale (SSSS; Kalichman, 2011) in Spanish samples. Two independent studies were conducted. In Study 1, we examined the factor structure of the SSSS in a sample of 1,272 heterosexual undergraduate students (40.0% men, 60.0% women). Results revealed a 2-factor structure. Factor 1 was related to physical sexual sensations and risky sexual behaviors and Factor 2 was related to exploratory or novel sex. A confirmatory factor analysis confirmed this factor structure in a sample of 373 community adults (33.8% men, 66.2% women). Two items were deleted, resulting in a final version composed of 8 items. This version showed good test–retest reliability and evidence of its concurrent validity. In Study 2, the factor structure was further confirmed in a sample of 1,596 university students (28.8% men, 71.2% women). More evidence of construct validity was provided, which revealed that higher levels of sexual sensation seeking were associated with more frequent sexual risk behaviors and poorer sexual health. Internal consistency reliability did not reach acceptable levels on all of the subscales. Results suggest that, although it has been used before, this scale needs a revision before its use in Spanish-speaking contexts.