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Two recent meta-analyses have generated evidence for child and adolescent psychotherapy effects. However, critics note that such meta-analyses often include studies with methodological shortcomings which might invalidate their results. In the present study, we explored whether the results of the most extensive child/adolescent meta-analysis might have been influenced by such methodological variables, focusing on internal validity and external validity factors. Together, these factors accounted for two-thirds as much variance as the substantive factors (e.g., type of therapy, age) in the original metaanalysis. This suggests that relative to these therapy and child-characteristic variables, methodological factors have a substantial, though smaller, impact on metaanalysis results. In general, increased experimental rigor was related to larger effect sizes; this argues against the hypothesis that methodologically weak studies have led to an overestimate of therapy effects. No significant interactive relations were found between validity factors and predictors of outcome; this suggests that the relations noted in previous metaanalyses between outcome and various variables were notdistorted by the validity factors tested here.The research described here was supported in part by grants from the North Carolina Department of Human Resources, Division of Mental Health, Mental Retardation, and Substance Abuse Services (41626), and from the National Institute of Mental Health (1 RO3 MH38450). The authors gratefully acknowledge the assistance of Todd Morton, who provided reliability coding. 相似文献
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C A Thurber M D Sigman J R Weisz C K Schmidt 《Journal of clinical child psychology》1999,28(2):185-196
Examined homesickness in 117 girls ages 8 to 16 during a 2-week stay at summer camp. (Homesickness is the distress or impairment caused by an actual or anticipated separation from home. It is characterized by acute longing and preoccupying thoughts of home and attachment objects.) Elevated preseparation levels of homesickness, high expectations of homesickness, negative separation attitudes, low decision control, and little previous separation experience predicted in-camp levels of homesickness. During the separation, homesickness was associated with insecure interpersonal attitudes, negative initial impressions of the novel environment, high perceived distance from home, and low perceived control. Female surrogate caregivers rated homesick girls as having lower social status and more somatic complaints, social problems, and externalizing behavior than less homesick girls. Although the prevalence, intensity, and longitudinal course of homesickness in girls did not differ from analogous samples of boys, girls' profile of risk factors, correlates, and sequelae is unique in its mixed behavioral presentation and small correlations with age and experience. 相似文献
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In contrast to models and theories that relate adult neurogenesis with the processes of learning and memory, almost no solid hypotheses have been formulated that involve a possible neurocomputational influence of adult neurogenesis on forgetting. Based on data from a previous study that implemented a simple but complete model of the main hippocampal circuitry (Weisz & Argibay, 2009), we now test this model under different situations to better study the case of remote memories. The results of this work show that following neurogenesis, the new, ongoing memories in the hippocampus are better retained than when no neurogenesis occurs at all, while the older memories are affected (to a lesser extent) by a special type of interference that is different from interference that occurs with an increasing number of memories per se. This work adds a new point of analysis in support of the interference view that might lead to the forgetting of memories in the hippocampus as they are transferred to neocortex for long-term storage, consistent with the Complementary Learning Systems models of system-level consolidation. Attention should be directed to the specific causes of interference; the results of this work signal a type of distortion of remote memories that is produced by the birth and the growth of new processing units, which results in a subtly impoverished retrieval as new neurons become active. The proposals of this model fit well with some empirical findings that are related to the issue. In the future, as new evidence emerges, we believe that this biological process, which is largely related to learning and memory, will also help to shape our ideas about normal forgetting and its possible contributions to system consolidation. 相似文献
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Effects of psychotherapy for depression in children and adolescents: a meta-analysis 总被引:12,自引:0,他引:12
Serious sequelae of youth depression, plus recent concerns over medication safety, prompt growing interest in the effects of youth psychotherapy. In previous meta-analyses, effect sizes (ESs) have averaged .99, well above conventional standards for a large effect and well above mean ES for other conditions. The authors applied rigorous analytic methods to the largest study sample to date and found a mean ES of .34, not superior but significantly inferior to mean ES for other conditions. Cognitive treatments (e.g., cognitive-behavioral therapy) fared no better than noncognitive approaches. Effects showed both generality (anxiety was reduced) and specificity (externalizing problems were not), plus short- but not long-term holding power. Youth depression treatments appear to produce effects that are significant but modest in their strength, breadth, and durability. 相似文献
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Weisz V 《Ethics & behavior》1992,2(3):185-201
The only hope of survival for children with a number of life-threatening illnesses is a successful bone marrow transplant (BMT). Unlike the treatment source for most therapies, the raw material for transplant therapy comes from a human being. Although many BMTs are autologous, utilizing the patient's own bone marrow, a large percentage of childhood BMTs rely on bone marrow from children or adolescents who are biological siblings to the sick child. Medical and legal systems are confronted with a dilemma when healthy children are needed to undergo minimally risky, yet somewhat painful, procedures for the benefit of their critically ill siblings. This article reviews legal issues involved in sibling bone marrow donation and psychological research that is relevant to those issues. The article concludes with proposed directions for future psycholegal research and a discussion of ethical issues that are not amenable to empirical investigation. 相似文献