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91.
Estrogens and progestins enhance spatial learning of intact and ovariectomized rats in the object placement task 总被引:6,自引:0,他引:6
Steroid modulation of cognitive function has focused on estrogen (E(2)), but progestins naturally co-vary with E(2) and may also influence cognitive performance. Spatial performance in the object placement task over endogenous hormonal states in which E(2) and progestins vary, and when E(2) and/or progestins were administered, was examined. Experiment 1: Rats in proestrus or estrus had significantly better performance in the object placement task than did diestrus rats. Experiment 2: Rats in the third trimester, post-partum, or lactation exhibited significantly better performance in the object placement task than did rats in the first trimester. Experiment 3: Ovariectomized (ovx) rats administered 17beta-estradiol (0.9 mg/kg), subcutaneously (sc), progesterone (P; 4 mg/kg, sc), or E(2) and P, immediately after training in the object placement task, performed significantly better when tested 4h later, than did control rats administered vehicle (sesame oil 0.2 cc). Experiment 4: ovx rats administered E(2) or P with a 1.5h delay after training in the object placement task, did not perform differently than vehicle-administered controls. Experiment 5: ovx rats administered post-training E(2), which has a high affinity for both E(2) receptor (ER)alpha and beta isoforms, or propyl pyrazole triol (PPT; 0.9 mg/kg, sc), which is more selective for ERalpha than ERbeta, had significantly better performance in the object placement task than did rats administered vehicle or diarylpropionitrile (DPN; 0.9 mg/kg, sc), an ERbeta selective ligand. Experiment 6: ovx rats administered P, or its metabolite, 5alpha-pregnan-3alpha-ol-20-one (3alpha,5alpha-THP; 4 mg/kg, sc), immediately post-training performed significantly better in the object placement task than did vehicle control rats. Thus, performance in the object placement task is better when E(2) and/or P are naturally elevated or when E(2), the ERalpha selective ER modulator PPT, P, or its metabolite, 3alpha,5alpha-THP, are administered post-training. 相似文献
92.
Lent and Brown [Lent, R. W., & Brown, S. D. (2006). Integrating person and situation perspectives on work satisfaction: A social-cognitive view. Journal of Vocational Behavior,69, 236-247] recently proposed an integrative model of work satisfaction linked to social cognitive career theory. The model posits that work satisfaction is predicted by five classes of variables: work conditions, goal progress, self-efficacy, goal and efficacy relevant supports, and personality traits (e.g., positive affect). We tested this model in a sample of 366 teachers, finding good overall model-data fit. Of the five predictor classes, work conditions, self-efficacy, and positive affect were each found to explain unique predictive variance. This suggests that teachers who are most satisfied with their jobs see their work environment as supportive, are confident in their abilities to complete work-related tasks and goals, and report high levels of trait positive affect. Findings also offered support for the contention that measures of subjective person-environment fit may not be empirically distinct from work satisfaction. Implications of these findings for future research and applied efforts are considered. 相似文献
93.
The authors provide a historical overview of the development of contemporary theories of counseling and psychology in relation to determinism, probabilistic causality, indeterminate free will, and moral and legal responsibility. They propose a unique model of behavioral causality that incorporates a theory of indeterminate free will, a concept traditionally assumed to exist by the U.S. legal system, but rejected in counseling theory. 相似文献
94.
Maureen Duffy Victoria A. Giordano Jill B. Farrell Oneyda M. Paneque Genae B. Crump 《Counseling and values》2009,53(1):53-66
High‐stakes testing and mandated assessments, which are major outcomes of the No Child Left Behind Act of 2001 (NCLB; 2002) contain multiple embedded values that affect the lives of students, their families, teachers, and counselors. A primary embedded value within the NCLB is the privileging of quantitative science over other methods of inquiry and assessment. Thus, accountability, a cornerstone of NCLB legislation, has come to be understood in a narrow way and is valued primarily as a feature of quantitative assessment. This restricted view of accountability has had significant effects on how teachers and counselors organize their work with students. 相似文献
95.
This study assessed the effect of ingroup norms and empathy on 6 and 9‐year‐old children's (N=161) attitudes and aggressive intentions toward outgroup members. Prior to an intergroup drawing competition against an outgroup, participants' empathy was measured, and they were randomly assigned to a simulated group with a norm of direct or indirect aggression, or no aggression norm. Results indicated participants' attitudes were less positive toward the outgroup vs. the ingroup, and that both direct and indirect aggressive intentions were displayed toward the outgroup. Most importantly, the ingroup was liked less when it had an aggression norm, and the participants' aggressive intentions were not enhanced by the group aggression norm. Empathy was a significant negative predictor of direct but not indirect aggression intentions. Implications for understanding the instigation and inhibition of children's aggression intentions are discussed. Aggr. Behav. 35:244–258, 2009. © 2009 Wiley‐Liss, Inc. 相似文献
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Drew Nesdale Michael J. Lawson Kevin Durkin Amanda Duffy 《The British journal of developmental psychology》2010,28(2):467-482
Research shows that being a member of a group is sufficient to instigate more positive attitudes towards the in‐group than an out‐group in young children. The present study assessed whether children's intergroup attitudes during the middle childhood years are moderated by additional information about in‐group and out‐group members, as proposed by Aboud's (1988) socio‐cognitive theory (ST). To a minimal group 6‐, 8‐, and 10‐year‐old children (N=159) were assigned, and received information, or no information, about the interests and activities of the in‐group and out‐group members. Results indicated that the in‐group was always rated more positively than the out‐group, and that the in‐group's ratings were unaffected by either the in‐group or out‐group information. In contrast, out‐group ratings were affected by out‐group information, but only when there was no information available about the in‐group. The implications of the findings for ST, and for social identity development theory, are discussed. 相似文献
99.
Keith Rayner Gretchen Kambe Susan A. Duffy 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2000,53(4):1061-1080
The effect of clause wrap-up on eye movements in reading was examined. Readers read passages in which a target category noun referred to either a high typical or a low typical antecedent. In addition, the category noun was either clause final or non-clause final. There were four primary results: (1) Readers looked longer at a category noun when its antecedent was a low typical member of the category than when it was a high typical member; (2)readers looked longer at the category noun and at the post-category region when they were clause final than when they were not clause final; (3) readers regressed from a category noun or post-category region more frequently when it was clause final than when it was not clause final; and (4) readers made longer initial saccades when their eyes left the category noun or post-category region when this word was in clause final position than when it was not clause final. The last result suggests that sometimes higher order processes that are related to making a decision about when to move the eyes impinge on lower level decisions that are typically associated with deciding where to move the eyes. 相似文献
100.