ELECTROPHYSIOLOGICAL CORRELATES OF STIMULUS EQUIVALENCE PROCESSES

Research reported here concerns neural processes relating to stimulus equivalence class formation. In Experiment 1, two types of word pairs were presented successively to normally capable adults. In one type, the words had related usage in English (e.g., uncle, aunt). In the other, the two words were not typically related in their usage (e.g., wrist, corn). For pairs of both types, event‐related cortical potentials were recorded during and immediately after the presentation of the second word. The obtained waveforms differentiated these two types of pairs. For the unrelated pairs, the waveforms were significantly more negative about 400 ms after the second word was presented, thus replicating the “N400” phenomenon of the cognitive neuroscience literature. In addition, there was a strong positive‐tending wave form difference post‐stimulus presentation (peaked at about 500 ms) that also differentiated the unrelated from related stimulus pairs. In Experiment 2, the procedures were extended to study arbitrary stimulus—stimulus relations established via matching‐to‐sample training. Participants were experimentally näive adults. Sample stimuli (Set A) were trigrams, and comparison stimuli (Sets B, C, D, E, and F) were nonrepresentative forms. Behavioral tests evaluated potentially emergent equivalence relations (i.e., BD, DF, CE, etc.). All participants exhibited classes consistent with the arbitrary matching training. They were also exposed also to an event‐related potential procedure like that used in Experiment 1. Some received the ERP procedure before equivalence tests and some after. Only those participants who received ERP procedures after equivalence tests exhibited robust N400 differentiation initially. The positivity observed in Experiment 1 was absent for all participants. These results support speculations that equivalence tests may provide contextual support for the formation of equivalence classes including those that emerge gradually during testing.     

The influence of family environment and child temperament on work/family role strain for mothers and fathers

This study examined the additive effect of structural variables, child characteristics, and the family environment on mothers' and fathers' work/family role strain. Differences between mothers and fathers on these variables were also examined. The sample consisted of 36 dualearner families whose children had been in daycare from infancy through 4 years of age. Structural variables included work schedules and time spent with child for mothers only, fathers only, and both parents together with child. Child characteristics included temperament and health. Family environment variables included different components of the family environment (conflict, cohesion, expressiveness, organization, and control) and parenting daily hassles. Results showed that mothers' time with child and caregiving for child were greater than fathers'. Mothers reported more expressiveness in the family and more daily hassles with children than fathers. Mothers' level of role strain was also significantly higher than fathers'. For mothers, role strain was associated with hours away from home, child sociability, family conflict, and daily hassles resulting in an R² of 0.57. Fathers' role strain was associated with family expressiveness, organization, and their wives' daily hassles resulting in an R² of 0.37. Data suggest that mothers' and fathers' role strain may be driven by somewhat different factors. For women, aspects of the family and the child and work hours accounted for a considerable portion of the variance while for men, only aspects of the family environment were associated with their level of role strain. Copyright © 2003 John Wiley & Sons, Ltd.     

Moving Beyond Anger and Depression: The Effects of Anxiety and Envy on Maladaptive Coping

According to general strain theory (GST), life stressors, or strains, lead to different types of negative emotions, some of which increase the likelihood of maladaptive coping. A considerable body of research testing GST focuses on anger and depression as manifestations of negative emotionality. Less research considers other types of negative emotions (e.g., anxiety and envy). The current study addresses this void in the literature through the use of surveys administered to a university-based sample. We also consider whether the effects of negative emotions vary by sex. The implications of our findings for theory, research, and mental health providers are discussed.     

Psychological Foundations of Trust

ABSTRACT— Trust lies at the foundation of nearly all major theories of interpersonal relationships. Despite its great theoretical importance, a limited amount of research has examined how and why trust develops, is maintained, and occasionally unravels in relationships. Following a brief overview of theoretical and empirical milestones in the interpersonal-trust literature, an integrative process model of trust in dyadic relationships is presented.     

Family Strain and Adolescent Delinquency in Two Chinese Cities,Guangzhou and Hong Kong

Elucidating the conditions in which family strain takes effect in adolescent delinquency is one avenue along which to substantiate general strain theory. These conditions include family relationship and the type of delinquency. In the context of Chinese societies, the conditions also include the differences between socialist, collectivist Mainland China and capitalist, more individualist Hong Kong. We collected survey data from 1,026 secondary school students in Guangzhou in Mainland China, and from 1,116 in Hong Kong, to demonstrate these conditions. The results, which indicate the intimate relationship between parents and adolescents, verify that family strain has a very strong impact on adolescent delinquency. In this connection, family strain comprised parental support as a negative indicator. However, the effect of parental support on adolescent strain was only weakly negative in Guangzhou and even positive in the case of nonworking mothers. The differentials in parental influence between Guangzhou and Hong Kong are attributable to the different family policies and structures in the two cities. On the other hand, family strain exhibited similar effects on two types of delinquency, violence and status offense.     

Development and initial validation of a measure of supportive and unsupportive managerial behaviors

Studies documenting the positive consequences of managerial support have continued unabated, despite considerable ambiguity surrounding the conceptualization of this construct and the adoption of measures that lack specificity. Moreover, research on the positive effects of managerial support has overshadowed our understanding of the ways in which managers contribute to job strain. In order to address these gaps, we took an inductive approach, documenting supportive, and unsupportive managerial behaviors reported by a sample of 25 employees working in a variety of occupations. We subsequently developed a new measure of supportive and unsupportive managerial behaviors and validated it with two separate samples (N = 100; N = 247). The measure demonstrated strong internal reliability and convergent validity. Factor analysis of the measure yielded a two-factor model of support and a one-factor structure of unsupportive behaviors. Theoretical and organizational implications of the findings are discussed.     

跨文化适应与应激、应激源研究:中国学生、学者在德国

本文旨在探讨在德国的中国学生／学者跨文化适应与应激源和应激之间的关系。其中,跨文化适应分为总体、人际及学习／工作适应三方面．应激源分为社会和学习／工作两方面,而应激则有文化、心理和生理三个层面。被试为99名在德国的中国留学生及访同学者。研究结果表明：除工作／学习应激与总体适应没有显著负相关之外,应激源与三方面的跨文化适应均显著负相关,回归分析表明了同样的趋势。在应激与跨文化适应的关系上,适应良好的被试应激水平较低。总体适应能够预测文化、生理及生理应激。     

The transformation of consequential functions in accordance with the relational frames of more-than and less-than

Across three experiments, the transformation of consequential functions in accordance with a seven-member relational network (A-B-C-D-E-F-G) was investigated. In this network, the relational rankings ranged from A, ranked the least, to G, ranked the most. In the first phase, contextual cues for more-than and less-than were established by training participants across multiple exemplars to select comparisons containing larger quantities in the presence of the former cue, and fewer quantities in the presence of the latter cue. Participants then were trained in six conditional discriminations (i.e., AD, F>E, and G>F) with the contextual cues as samples and nonsense words as comparisons, and all possible derived relations were tested (e.g., B相似文献   

Experimental control of nodality via equal presentations of conditional discriminations in different equivalence protocols under speed and no-speed conditions

A within-participant comparison of simple-to-complex, complex-to-simple, and simultaneous protocols was conducted establishing different sets of three 7-member equivalence classes for 4 undergraduate students. The protocols were implemented under either accuracy-only or accuracy-plus-speed conditions while keeping number of presentations of training and testing trials equal. The results partially support previous reports of differential effects on acquisition, with participants completing more blocks in training under the simultaneous than the complex-to-simple and the simple-to-complex protocols. Across the protocols, however, the number of trials completed to criterion did not vary systematically. More important, response speed and accuracy did not decrease as a function of nodal number, with or without the speed contingency, or under any protocol. The latter results challenge the generality of previous reports of the nodality effect and the notion of "relatedness" of equivalence-class members, and support a reinforcement-contingency, instead of a structural, perspective on equivalence-class formation.     

Stimulus equivalence: testing Sidman's (2000) theory

Sidman's (2000) theory regarding the origin of equivalence relations predicts that a reinforcing stimulus common to distinct equivalence classes must drop out of the equivalence relations. This prediction was tested in the present study by arranging class-specific reinforcers, R1 and R2, following correct responding on the prerequisite conditional discriminations (Ax-Bx, Cx-Bx) for two stimulus classes, A1B1C1 and A2B2C2. A class-common reinforcer, R3, was presented following correct responding on the prerequisite conditional discriminations for a further two stimulus classes, A3B3C3 and A4B4C4. Sidman's theory predicts reinforcer inclusion within Classes 1 and 2 only, given this training arrangement. Experiment 1 tested for the emergence of four equivalence classes and of stimulus-reinforcer and reinforcer-stimulus relations in each class. Four of the 6 subjects demonstrated the reinforcer-based relations in all four equivalence classes, rather than in only those classes with a class-specific reinforcer, as Sidman's theory predicts. One of the remaining 2 subjects showed the reinforcer-based relations in three of the four classes. Experiment 2 extended these findings to document the emergence of interclass matching relations based on the common reinforcer R3, in 5 of 6 subjects, such that a Class 3 sample occasioned the selection of a Class 4 sample when the Class 3 comparison was absent, and similarly, a Class 4 sample occasioned the selection of a Class 3 comparison when the Class 4 comparison was absent. These interclass relations emerged despite the simultaneous maintenance of Class 3 and 4 baseline conditional discriminations, so that the Class 3 and 4 stimuli and reinforcer simultaneously were, and were not, part of a single larger equivalence class. These data are irreconcilable with Sidman's theory, and question the utility of the application of the equivalence relation in describing derived stimulus relations.