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161.
An association between the DAT1 polymorphism and smoking behavior in young adults from the National Longitudinal Study of Adolescent Health. 总被引:2,自引:0,他引:2
David S Timberlake Brett C Haberstick Jeffrey M Lessem Andrew Smolen Marissa Ehringer John K Hewitt Christian Hopfer 《Health psychology》2006,25(2):190-197
Associations between smoking behavior and polymorphisms in the dopaminergic genes (DAT1 and DRD2) were tested by using within- and between-family measures of allelic transmission in 2,448 young adults from the National Longitudinal Study of Adolescent Health. The 9-repeat allele of the dopamine transporter gene polymorphism (DAT1) was inversely associated with smoking in samples that included all subjects and only those who had initiated smoking, accounting for approximately 1% of the variance. Never smokers and current nonsmokers had an excess transmission of the 9-repeat allele compared with regular smokers, suggesting a protective effect of the 9-repeat allele, which is hypothesized to alter synaptic dopamine levels. 相似文献
162.
Stefan G. Hofmann Michael Suvak Brett T. Litz 《Personality and individual differences》2006,40(8):1683-1690
To study sex differences in the recognition of human faces with different facial expressions, 65 female and 64 male participants learned to associate names with various male and female neutral faces. During the recall phase, participants were then asked to name the same persons depicting different emotional expressions (neutral, happy, angry, and fearful). Females were faster than males at naming male faces, and males were faster than females at naming female faces. All participants were faster at naming neutral or happy female faces than neural or happy male faces. These results suggest that opposite-sex faces require less processing time than same-sex faces, which is consistent with an evolutionary account. 相似文献
163.
Nikos L. D. Chatzisarantis Martin S. Hagger Brett Smith Luke D. Sage 《European journal of social psychology》2006,36(2):229-237
The present study examined the utility of two forms of measurement of intrinsic motivation in increasing the predictive validity of the theory of planned behaviour. Self‐report questionnaires were administered to school pupils (n = 174), University students (n = 129) and adults (n = 157). The data were analysed using confirmatory factor analysis and regression analysis. Confirmatory analysis supported discriminant validity between Forms A and B measures of intrinsic motivation. In addition, hierarchical regression analysis demonstrated that Form B measure of intrinsic motivation increased effectiveness of the theory of planned behaviour in predicting intentions and social behaviour. Further, the regression analysis showed that age and past behaviour did not reduce the effects observed for intrinsic motivation. It is recommended that intrinsic motivation could increase the predictive utility of the theory of planned behaviour. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
164.
Three experiments tested the exemplar cuing and frequency format accounts of how the ‘imaginability’ of low‐probability events is enhanced. The experiments manipulated imaginability by varying the statistics used to describe negative (e.g. being scarred as a result of laser surgery) and positive (e.g. winning a lottery) low‐probability events. The results strongly supported the frequency format account, whereby imaginability is enhanced through the use of frequency formats for conveying statistical information (e.g. 20 out of 2000 as opposed to 0.01%). However, only limited support was found for exemplar cuing (EC) theory. Overall the results support the claim that the imaginability of outcomes plays a key role in thinking about low‐probability events, but question the mechanisms specified by EC theory for mediating such effects. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
165.
Terrorism creates a ripple of fear and uncertainty. Although most individuals are resilient and recover over time, a minority remains functionally and psychologically impaired. In this paper, we examine research on coping strategies employed in the aftermath of terrorist events, theories and empirical findings related to appraisal processes that influence individuals' primary attributions of risk, and normative processes that shape secondary appraisals, which predict specific coping behaviors. We also describe individual diatheses and factors promoting resilience that may influence coping and functioning in the face of terrorism. Finally, we offer suggestions for future research. 相似文献
166.
Three studies examined the development of category-based induction using an induction then recognition (ITR) procedure in which participants make category-based predictions about study items and are then given a surprise recognition test that requires discrimination between old and new category members. Exposure duration for study items was either self-paced (Experiment 1) or fixed for 5-year-olds and adults (Experiments 2a-b). Adults always showed a decrement in recognition performance following induction. Children showed the same decrement when exposure duration was equated across age groups. These results show that both young children and adults spontaneously access category-level information during induction. When study exposure time is self-paced, however, children may process additional, noncategorical aspects of study stimuli. (PsycINFO Database Record (c) 2008 APA, all rights reserved). 相似文献
167.
Conducting studies using an undergraduate participant pool is fraught with difficulties. Among them are problems with adequately motivating subjects both to come to the study, and once there, to actively engage the experimental task. Thirty-one college students participated in a matching-to-sample (MTS) study involving substantial training, testing, retraining, and retesting of conditional discriminations and equivalence relations among four 4-member classes of nonsensical words. The study was conducted during the end of the semester, when performance often had been observed to be poorer than at other points in the semester. Eleven of the participants, in addition to standard instructions about the task, received additional instructions specifying molar consequences for high rates of "correct" responses throughout the procedure. This subset of participants displayed markedly improved performance as compared to those who did not receive the additional instructions. Results suggest that specification of molar contingencies improves participants' sensitivity to molecular contingencies within the study. Instructions that specify and increase the consequential functions of feedback provided during MTS trials may be one means of reducing unwanted variability in human MTS performance. 相似文献
168.
169.
Tracy DeHart Sandra L Murray Brett W Pelham Paul Rose 《Journal of experimental social psychology》2003,39(1):59-67
We propose that the insecurities about a close other’s regard that make it difficult for low self-esteem people to form satisfying romantic relationships also create difficulties in family relationships. Our study revealed that low self-esteem mothers and children felt less loved by one another than did high self-esteem mothers and children. These feelings of not being loved partially accounted for the tendency of low self-esteem children and mothers to be dissatisfied with their relationships. Ironically, however, low self-esteem children’s insecurities about how much their mothers loved them were not warranted by the strength of their mother’s love. Taken together, these findings suggest that the processes that regulate attachment to significant others extend to familial as well as romantic relationships. 相似文献
170.
John T Jost Brett W PelhamMauricio R Carvallo 《Journal of experimental social psychology》2002,38(6):586-602
According to system justification theory, people internalize and perpetuate systemic forms of inequality, even though it sometimes means harboring preferences for members of higher status outgroups. In Study 1, students from a high status (but not a low status) university exhibited significant ingroup favoritism on the IAT, an automatic evaluative measure. Furthermore, for students at the high status university, implicit ingroup bias was positively correlated with implicit self-esteem. For students at the low status university, implicit acceptance of consensual stereotypes concerning academic and extracurricular characteristics was associated with implicit outgroup favoritism. In Study 2, Latinos and Asian Americans exhibited significant outgroup favoritism on an unobtrusive behavioral measure by choosing White interaction partners over members of their own groups. In Study 3, parents named newborn children disproportionately after their fathers (compared with their mothers) and published birth announcements for boys slightly more often than for girls. Thus, we observed evidence of system justification on implicit or unobtrusive measures in three different socially disadvantaged groups. 相似文献