Experimental evidence for aggressive antipredator behavior in black skimmers (rynchops niger)

We experimentally studied the aggressive antipredator behavior of black skimmers Rynchops niger nesting in a salt marsh and sandy beach with the use of a live herring gull Larus argentatus. Although there were no significant habitat differences in vegetation cover, distance from the edge of the colony, or nesting density, skimmers nesting in salt marshes were more aggressive toward the herring gull than were those nesting on the beach. Aggression increased during the first three minutes of the test, and decreased slightly thereafter. Aggression levels were highest when the gull moved compared to when it was stationary. Skimmers made few responses when a person was present with the gull, but aggression increased dramatically when only the gull remained. Our results suggest skimmers may engage in more aggressive behavior in defense of their nests than previously thought, particularly when exposed to a predator that actually takes eggs and chicks. Further, we suggest that conclusions about antipredator behavior drawn only from studies of interactions with people may need further amplification. © 1992 Wiley-Liss, Inc.     

Prediction of Posttraumatic Stress Disorder From Peritraumatic Dissociation and Distress Among Men and Women Victims of Violent Crimes

This prospective study evaluated the main and interactive effects of peritraumatic reactions with gender on posttraumatic stress disorder (PTSD) onset, independently of known risk factors. Further, 111 adult victims of violent crime completed the Structured Clinical Interview, the Modified PTSD Symptom Scale, the Peritraumatic Dissociative Experience Questionnaire, and the Peritraumatic Distress Inventory. Hierarchical regressions and chi-square tests were conducted for continuous and categorical measures of PTSD. Extremely elevated scores of peritraumatic dissociation (PD) and peritraumatic distress (PDI) were obtained for both sexes. Greater PDI and PD were related to more PTSD symptoms. No significant interaction effects with gender emerged. These results remained when acute stress disorder was controlled for. Analyses on categorical data produced similar results. Victims of violent crimes recall severe peritraumatic reactions. The more severe these are, the more likely they are to develop significant PTSD symptomatology in the months that follow.     

The lone gamer: Social exclusion predicts violent video game preferences and fuels aggressive inclinations in adolescent players

Violent video game playing has been linked to a wide range of negative outcomes, especially in adolescents. In the present research, we focused on a potential determinant of adolescents’ willingness to play violent video games: social exclusion. We also tested whether exclusion can predict increased aggressiveness following violent video game playing. In two experiments, we predicted that exclusion could increase adolescents’ preferences for violent video games and interact with violent game playing fostering adolescents’ aggressive inclinations. In Study 1, 121 adolescents (aged 10–18 years) were randomly assigned to a manipulation of social exclusion. Then, they evaluated the violent content of nine different video games (violent, nonviolent, or prosocial) and reported their willingness to play each presented video game. The results showed that excluded participants expressed a greater willingness to play violent games than nonviolent or prosocial games. No such effect was found for included participants. In Study 2, both inclusionary status and video game contents were manipulated. After a manipulation of inclusionary status, 113 adolescents (aged 11–16 years) were randomly assigned to play either a violent or a nonviolent video game. Then, they were given an opportunity to express their aggressive inclinations toward the excluders. Results showed that excluded participants who played a violent game displayed the highest level of aggressive inclinations than participants who were assigned to the other experimental conditions. Overall, these findings suggest that exclusion increases preferences for violent games and that the combination of exclusion and violent game playing fuels aggressive inclinations.

     

创伤暴露对青少年暴力行为和自杀意念的影响:创伤后应激障碍和抑郁的中介作用

采用创伤暴露问卷、基于DSM-5的创伤后应激障碍症状核查表、流调中心用抑郁量表和青少年行为问题调查表,在雅安地震3.5年后对地震极重灾区的703名中学生进行调查,考察创伤暴露对暴力行为和自杀意念的影响,并检验创伤后应激障碍和抑郁在其中的中介作用。结果发现：创伤暴露可以直接正向预测暴力行为和自杀意念,PTSD在创伤暴露对暴力行为和自杀意念的影响间起中介作用,抑郁仅在创伤暴露对自杀意念的影响间起中介作用,而在创伤暴露对暴力行为影响间的中介效应不显著。     

The moral compass and life skills in navigating radicalization processes: Examining the interplay among life skills,moral disengagement,and extremism

The present study investigated the interplay among deficient life skills, moral disengagement, and extremist attitude across two national contexts. Using a sample of young students in high school or college (N = 686), the present study found significant indirect effects between deficient life skills (agency and structure) and various aspects of an extremist mindset through moral disengagement. These findings suggest that these two psychological concepts of life skills and moral disengagement are relevant for understanding and countering violent radicalization processes; that is to say that morality can direct the life skills toward either violent extremism or nonviolent, legal civil participation. Furthermore, the development and empowerment of life skills could enhance individual resilience to morally disengaging narratives and radicalized ideologies.     

Antipredator behavior of Swiss-Webster mice in a visible burrow system

Swiss-Webster mice living in a visible burrow system (VBS) reacted to presentation of a live cat in the surface area of the VBS by retreat to the burrows and reductions in nondefensive behaviors such as eating and drinking. Live eat-exposed subjects remained in the burrows 14 hr or more, while subjects exposed to a toy (plush) cat prior to live cat exposure reemerged almost immediately and made many contacts with the toy cat. However, subjects exposed first to the cat and later to a toy cat showed intermediate surface reemergence times and cat contacts during toy cat tests, indicating strong sensitization effects of prior live cat exposure. Previous studies indicated that rats in this situation show retreat to the burrows, surface avoidance, and reduction in nondefensive behaviors. The mouse pattern was similar, with the notable exception that in the first 5min block after cat presentation, mice rapidly alternated retreat to the burrow chambers with reappearance in the tunnel segment near the surface, to scan the surface visually and sniff. Movement during this time block involved a stretch attend posture characteristic also of risk assessment activities in rats. Such visual and olfactory inspection of the cat is not seen in rats in the VBS. This difference may be related to the finding that rats, but not mice, emit ultrasonic “alarm cries” during and after cat exposure. © 1995 Wiley-Liss, Inc.     

Adolescents’ Change in Motivation as a Result of Buddhist Education: How Does It Make a Difference in Their Learning Outcomes?

Motivation significantly influences students’ learning outcomes. Changing their learning motivation improves their performance. This study used an exploratory sequential mixed methods approach, with the participation of 140 adolescents attending retreats at three Zen monasteries belonging to the Truc Lam (Bamboo Forest) Zen sect, to examine how they changed their motivation, what made them change, and how the change improved their learning outcomes. The study also evaluated the effect of gender and age on changes in motivation. The results indicated that many teenagers had changed from extrinsic to intrinsic motivation thanks to Dharma lessons, teacher support, and leisure activities. Compared to students who maintained their extrinsic motivation unchanged, they had better learning outcomes. Age, but not gender, had a considerable effect on changes in teenagers’ motivation. These findings provide more evidence for extending Buddhist education and conducting further research on young Buddhist learners’ motivation in various contexts.     

Political distrust,perceived threat,and intentions to engage in normative and violent collective action: A mixed-methods study

In three studies, we examined the role of distrust and perceived threat in intentions to engage in normative and violent non-normative collective action. A field-based qualitative study of 35 pro-democracy protestors during the 2019 Hong Kong Anti-Extradition protests revealed that perceived threat to Hong Kong values alongside distrust of political institutions spurred collective action engagement and support for defensive violent collection action. In Study 2, a questionnaire (N = 639) testing pro-democracy action intentions demonstrated direct paths on both normative and violent collective action intentions from distrust and threat. In Study 3 (N = 133), experimental trust and threat manipulations demonstrated a significant association between distrust and threat on violent collective action intentions and acceptance, and a significant interaction on acceptance of violent collective action. Our results reveal the importance of distrust and threat in attitudinal support for, and engagement in, collective action and their role in transitioning from non-violent to violent collective action.     

暴力电子游戏对攻击行为的影响及其争论

以Anderson为核心的研究者通过数十年研究发现, 暴力电子游戏是攻击行为产生的前因变量, 并且提出可以用一般攻击模型(General Aggression Model, GAM)来解释这一结论。然而, Ferguson等人的研究表明, 暴力电子游戏不是攻击行为产生的前因变量, 而是攻击行为产生的催化剂, 并提出催化剂模型(Catalyst Model, CM)来解释该结论。由于社会心理研究中, 实验研究难以严格控制, 导致研究结果大径相庭, 暴力电子游戏影响攻击行为的争论还在不断扩大。未来要加强对暴力电子游戏和攻击行为的测量, 同时还需整合一般攻击模型和催化剂模型指导实证研究, 最后从认知偏差以及社会认知神经科学视角寻求暴力电子游戏对攻击行为影响的新证据。