Achievement-Based Rewards and Intrinsic Motivation: A Test of Cognitive Mediators.

This study assessed how rewards impacted intrinsic motivation when students were rewarded for achievement while learning an activity, for performing at a specific level on a test, or for both. Undergraduate university students engaged in a problem-solving activity. The design was a 2 × 2 factorial with 2 levels of reward in a learning phase (reward for achievement, no reward) and 2 levels of reward in a test phase (reward for achievement, no reward). Intrinsic motivation was measured as time spent on the experimental task and ratings of task interest during a free-choice period. A major finding was that achievement-based rewards during learning or testing increased participants' intrinsic motivation. A path analysis indicated that 2 processes (perceived competence and interest-internal attribution) mediated the positive effects of achievement-based rewards in learning and testing on intrinsic motivation. Findings are discussed in terms of the cognitive evaluation, attribution, and social-cognitive theories. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Representational systems and eye movements in an interview.

Tested the assumption that the perceived relationship between counselor (interviewer) and client (participant) is enhanced using the model postulated by J. Grinder et al (1977). 72 17–27 yr olds participated in 1 of 2 interview conditions: (a) a congruent interview in which interviewers responded with "perceptual predicates" that matched Ss' representational system as indicated by eye movement and (b) an incongruent interview in which interviewers mismatched Ss' representational system. Empathy, ease, anxiety, and hostility were measured by 3 self-report instruments: Barrett-Lennard Relationship Inventory-Empathic Understanding Scale, Ease of Communication Inventory, and Multiple Affect Adjective Check List. Seven hypotheses used to test the main effects and interactions of sex of interviewer, sex of participant, and condition revealed questionable support for the notion of increased rapport when interviewers responded congruently to representational systems indicated by Ss' eye movements. (23 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Early experiences with family conflict: Implications for arguments with a close friend.

This study examined associations between children's early experiences in family disputes and their later management of conflicts with a close friend. Thirty-seven children were observed interacting with their mother and older sibling at 33 months and with a friend at 72 months. Children's early use of argument was not associated with their later behavior during disputes with a friend. However, argument used by the mother and sibling that considered the child's needs was positively associated with the child's later use of constructive argument and resolution techniques. The mother's use of argument that focused on her own needs was negatively related to these outcomes. These associations were independent of global characteristics of the mother-child and sibling relationships. Moreover, the mother's use of argument predicted the child's later conflict management independent of the child's early argument patterns, emotion understanding, and verbal fluency. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Predictors of the first onset of a major depressive episode and changes in depressive symptoms across adolescence: Stress and negative cognitions.

This 6-year longitudinal study examined stressors (e.g., interpersonal, achievement), negative cognitions (self-worth, attributions), and their interactions in the prediction of (a) the first onset of a major depressive episode (MDE), and (b) changes in depressive symptoms in adolescents who varied in risk for depression. The sample included 240 adolescents who were first evaluated in Grade 6 (M = 11.86 years old; SD = 0.57; 54.2% female) and then again annually through Grade 12. Stressful life events and depressive diagnoses were assessed with interviews; negative cognitions and depressive symptoms were assessed with self-report questionnaires. Discrete time hazard modeling revealed a significant interaction between interpersonal stressors and negative cognitions, indicating that first onset of an MDE was predicted by high negative cognitions in the context of low interpersonal stress, and by high levels of interpersonal stressors at both high and low levels of negative cognitions. Analyses of achievement stressors indicated significant main effects of stress, negative cognitions, and risk in the prediction of an MDE, but no interactions. With regard to the prediction of depressive symptoms, multilevel modeling revealed a significant interaction between interpersonal stressors and negative cognitions such that among adolescents with more negative cognitions, higher levels of interpersonal stress predicted higher levels of depressive symptoms, whereas at low levels of negative cognitions, the relation between interpersonal stressors and depression was not significant. Risk (i.e., maternal depression history) and sex did not further moderate these interactions. Implications for intervention are discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

欧洲家用硬表面清洗剂的现状与未来（英）

近年来，家用硬表面清洗剂的发展异常活跃，并在西欧形成了高度细分的消费市场。这种发展趋势是由以下多种因素共同驱动的，如人们对微生物污染的关注、家庭生活模式的改变、表面材质的更新和公众环保意识的增强等。硬表面清洗剂应该在清除表面污垢的同时不损伤表面，在表面无残留物。理想的情形为，表面不需要进行漂洗，清洗剂不会残留斑纹，污渍或痕迹，并且对表面、使用者和环境均无害。介绍了家用硬表面清洗剂的配方变化及配方中各组分的功能，并预测了硬表面清洗剂的发展趋势。