行为免疫系统理论及其研究:新视野下的再考察

行为免疫系统理论认为, 为了应对流行病威胁, 人类进化出了一套特殊的行为反应倾向, 包括对疾病线索的警觉、厌恶, 对健康配偶的偏好, 对外群体的排斥, 对集体主义的推崇等。已有研究主要从宏观(群体)和微观(个体)两个水平开展, 虽然有大量研究结果支持该理论, 但也存在不少不一致甚至相反的发现。研究方法、理论基础和现代适用性等方面的不足可能是出现这种情况的原因。未来研究需克服上述问题, 并进一步拓展该理论的研究内容, 检验理论和相关研究的边界, 探讨行为免疫背后的生理机制等。     

Index to Volume 170

The number of only children in China has increased rapidly since the late 1970s, when the Chinese government advocated the “one-child-per-family” policy. This increase has caused much public concern about the healthy growth of the young generation. In this study the behavioral traits of Chinese, urban, only children were investigated. The participants were 444 children with siblings and 473 only children from Grades 1, 3, and 5 in Beijing primary schools. An inventory consisting of 27 items covering three behavioral traits was developed. The children were rated on the inventory by the principal teacher of the class. Factor analysis revealed three main factors: achievement motivation, interpersonal skills, and attitude toward manual labor. The only children exceeded the sibling children on achievement motivation. No differences were found between only children and sibling children on interpersonal skills and attitude toward manual labor. Gender differences were evident; girls consistently received higher ratings on achievement motivation and interpersonal skills. The possible underlying reasons for these differences are discussed.     

Self-supporting personality and psychological symptoms: The mediating effects of stress and social support

This study examined relations among self-supporting personality, stress, social support, and psychological symptoms in a sample of 782 Chinese undergraduate students using the Self-Supporting Personality Scale for Adolescent Students (SSPS-AS), Adolescent Self-Rating Life Event Checklist (ASLEC), Multidimensional Scale of Perceived Social Support (MPSSS), and Symptoms Check List 90 (SCL-90). As predicted, results from cross-sectional structural equation analyses suggested that stress and social support mediate the relationship between four self-supporting personality traits and psychological symptoms; an alternative stress-moderation model was not supported.     

Defensive reactions to slim female images in advertising: The moderating role of mode of exposure

Across three studies, we examined the impact of exposure to idealized female images, blatantly vs. subtly, on females’ self-evaluations, as well as attitude towards brands endorsed by the models with these idealized body images, in marketing communications. We theorized and showed that blatant exposure can elicit defensive coping, leading to a more positive self-evaluation and a lower brand attitude toward a brand endorsed by a model with an idealized body image. When exposure is subtle, however, idealized body images lead to lowered self-evaluations and increased evaluations of endorsed brands.     

The Use of Non-invasive Brain Stimulation Techniques to Facilitate Recovery from Post-stroke Aphasia

Aphasia is a common symptom after left hemispheric stroke. Neuroimaging techniques over the last 10–15 years have described two general trends: Patients with small left hemisphere strokes tend to recruit perilesional areas, while patients with large left hemisphere lesions recruit mainly homotopic regions in the right hemisphere. Non-invasive brain stimulation techniques such as transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS) have been employed to facilitate recovery by stimulating lesional and contralesional regions. The majority of these brain stimulation studies have attempted to block homotopic regions in the right posterior inferior frontal gyrus (IFG) to affect a presumed disinhibited right IFG (triangular portion). Other studies have used anodal or excitatory tDCS to stimulate the contralesional (right) fronto-temporal region or parts of the intact left IFG and perilesional regions to improve speech-motor output. It remains unclear whether the interhemispheric disinhibition model, which is the basis for motor cortex stimulation studies, also applies to the language system. Future studies could address a number of issues, including: the effect of lesion location on current density distribution, timing of the intervention with regard to stroke onset, whether brain stimulation should be combined with behavioral therapy, and whether multiple brain sites should be stimulated. A better understanding of the predictors of recovery from natural outcome studies would also help to inform study design, and the selection of clinically meaningful outcome measures in future studies.     

Shared Knowledge Matters: Culture as Intersubjective Representations

The intersubjective representation approach to culture focuses on cultural members’ shared knowledge representations about the culture that they are in. Members of the same culture tend to share certain knowledge representations of the central characteristics of the culture. These shared cultural representations are established and perpetuated through dynamic communicative processes. Recent empirical research has provided support for the incremental value of intersubjective cultural representations in research on cultural identity, social cognition, and behaviors. The intersubjective representation approach complements extant research on culture as self and external artifacts. In doing so, it allows for a more comprehensive understanding of culture’s role in social and personality psychological processes.     

Asian adolescents’ perceptions of parent, peer, and school support and psychological adjustment: The mediating role of dispositional optimism

This investigation examines the respective contributions of perceived support from parents, peers, and school to the psychological adjustment of 519 thirteen-year-old Asian adolescents from a middle school in Singapore, and the mediating role dispositional optimism plays in these relationships. The findings suggest that positive supportive relationships with parents, peers, and the school are important contextual factors influencing the psychological well-being of these adolescents. Dispositional optimism partially mediates support from each of these three sources and psychological adjustment. Sex differences were noted. This study contributes to a small body of research highlighting the role of a positive mechanism that underpins emotional wellbeing and psychological adaptation in the three developmental contexts that are important in shaping the beliefs, thinking and behavior of the growing Asian adolescent, particularly with respect to girls. Implications arising from this study are discussed. This study was supported by the Academic Research Fund grant (RI 5/04 YLS) from National Institute of Education to Lay See Yeo.     

Psychological motives and online games addiction: a test of flow theory and humanistic needs theory for Taiwanese adolescents.

Obviously, the negative impact of online games has received much attention as well as having become a popular research topic. This research explored, from flow theory and humanistic needs theory, the psychological motivations of Taiwanese adolescents who are addicted to online games. The purpose of Study 1 was to investigate the relationship between players' flow state and their online games addiction. The results indicated that flow state was negatively correlated with addictive inclination and it was not a significant predictor for players' subsequent additive inclination. Findings also revealed that the addicts' flow state was significantly lower than the nonaddicts. Thus, flow state might not be the key psychological mechanism of players' addiction. In Study 2, the results showed that the psychological needs of players of online games were close to the two-factor theory which depicts satisfaction and dissatisfaction dimensions. Addicted players' need-gratification was similar to the feature of dissatisfactory factor. That is, the absence of playing online games is more likely to generate sense of dissatisfaction; the addicts' compulsive use of online games seems to stem from the relief of dissatisfaction rather than the pursuit of satisfaction. In contrast, online games tend to provide the nonaddicts with a sense of satisfaction rather than a sense of dissatisfaction.     

Group-serving attributions across intergroup contexts: Cultural differences in the explanation of sex-typed behaviours

This research attempted to integrate Tajfel's (1978) social identity theory with self-presentational concerns by exploring attributions about perceived group differences in behaviour. As such, it dealt with group-level rather than individual-level attributions, exploring whether bias in making such verbal attributions varied as a function of the interviewer's group identity and the presence of an ingroup audience. Undergraduate men and women at The Chinese University of Hong Kong rated the appropriateness of ingroup-favouring and outgroup-favouring explanations for male-typed and female-typed behaviors in a face-to-face interview. A group-serving bias was found for female-typed behaviours, but only when the same-sex audience was absent. A conceptual replication of the experiment was run in the United States to examine the possible cultural basis for the Chinese moderation of favouritism in the audience condition. The group-serving bias was more robust for the American undergraduates, extending across male- and female-typed behaviours and also across audience conditions, It was argued that these cultural differences in attributional bias appear to reflect the strength of the movement for women's liberation and norms surrounding the avoidance of conflict in the United States and Hong Kong.     

When modesty fails: The social impact of group-effacing attributions following success or failure

This study explored how group members perceived a fellow group member who made either group-serving or group-effacing attributions following success or failure. Forty male undergraduates from the Chinese University co-operated in pairs with a confederate on a demanding group task. After learning that their group's performance had exceeded or failed to meet a standard, the subjects heard their confederate-partner make group-effacing or group-serving attributions. As predicted, subjects evaluated the group-serving partners more highly (p < 0.05). Preference for group-enhancing members was discussed as a pancultural response arising from the interdependence of group members. Given the process of social categorization, group members rise or fall together and are therefore socialized to support their group.