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This study examined various factors that affect statistical power in randomized intervention studies with noncompliance. On the basis of Monte Carlo simulations, this study demonstrates how statistical power changes depending on compliance rate, study design, outcome distributions, and covariate information. It also examines how these factors influence power in different methods of estimating intervention effects. Intent-to-treat analysis and complier average causal effect estimation are compared as 2 alternative ways of estimating intervention effects under noncompliance. The results of this investigation provide practical implications in designing and evaluating intervention studies taking into account noncompliance. 相似文献
153.
In the part-set cuing effect, cuing a subset of previously studied items impairs recall of the remaining noncued items. This
experiment reveals that cuing participants with previously-studied emotional pictures (e.g., fearevoking pictures of people)
can impair recall of pictures involving the same emotion but different content (e.g., fear-evoking pictures of animals). This
indicates that new events can be organized in memory using emotion as a grouping function to create associations. However,
whether new information is organized in memory along emotional or nonemotional lines appears to be a flexible process that
depends on people’s current focus. Mentioning in the instructions that the pictures were either amusement- or fear-related
led to memory impairment for pictures with the same emotion as cued pictures, whereas mentioning that the pictures depicted
either animals or people led to memory impairment for pictures with the same type of actor. 相似文献
154.
Child negative emotionality and parenting from infancy to preschool: a meta-analytic review 总被引:1,自引:0,他引:1
This meta-analytic review (k = 62 studies; N = 7,613 mother-child dyads) shows that effect sizes for the association between child negative emotionality and parenting were generally small and were moderated by sample and measurement characteristics. The association between more child negative emotionality and less supportive parenting was relatively strong in lower socioeconomic status families, reversed in higher socioeconomic status families, and limited to studies with relatively high percentages of participants from ethnic minorities and studies using parent report to assess negative emotionality. Higher levels of child negative emotionality were associated with more restrictive control in samples with less than 75% 1st-born children, as well as in infants and preschoolers, and in studies using parent report or composite measures to assess both negative emotionality and restrictive parenting. Finally, more child negative emotionality was associated with less inductive control. 相似文献
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Group‐level effects of forgiveness: Group cohesiveness and collective action in social dilemmas
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Kyle Irwin Jo‐Ann Tsang Robert Carlisle Megan Johnson Shen 《European journal of social psychology》2014,44(4):280-286
Forgiveness research has predominately focused on individual/relational outcomes such as well‐being and closeness. Less research has examined group outcomes such as cohesiveness or collective action. Forgiveness studies have also emphasized the victim's or transgressor's perspective, neglecting the effects of forgiveness on ingroup members who have neither given nor received forgiveness. We theorize that forgiveness promotes collective action among ingroup members through group cohesiveness and that transgressors' apologetic reactions impact this process. In a laboratory experiment, 229 students (175 females) were led to believe they were in a social dilemma with three others. Some participants witnessed group members forgive an apologetic, obstinate, or neutral defector, whereas others witnessed an unforgiving response. Forgiveness of apologetic and neutral defectors increased later cooperation among ingroup members. This effect was generally mediated by group cohesiveness. Our findings suggest that forgiveness can impact cooperation on a group level, providing a path to successful resolutions to collective action problems. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
159.
Following metaphorical theories of affect, several research studies have shown that the spatial cues along a vertical dimension are useful in qualifying emotional experience (HAPPINESS is UP, SADNESS is DOWN). Three experiments were conducted to examine the role of vertical motion in affective judgment. They showed that positive stimuli moving UPWARD were evaluated more positively than those moving DOWNWARD, whereas negative stimuli moving DOWNWARD were evaluated as less negative than those moving UPWARD. They showed a valenced congruency effect, but an alternative hypothesis in terms of MORE is UP and LESS is DOWN was also examined. Finally, fluency mechanisms were investigated to confirm that relationships between affect and verticality were in accordance with a valenced congruency effect. 相似文献
160.
Ana Paula Soares José Carlos Medeiros Alberto Simões João Machado Ana Costa Álvaro Iriarte José João de Almeida Ana P. Pinheiro Montserrat Comesaña 《Behavior research methods》2014,46(1):240-253
In this article, we introduce ESCOLEX, the first European Portuguese children’s lexical database with grade-level-adjusted word frequency statistics. Computed from a 3.2-million-word corpus, ESCOLEX provides 48,381 word forms extracted from 171 elementary and middle school textbooks for 6- to 11-year-old children attending the first six grades in the Portuguese educational system. Like other children’s grade-level databases (e.g., Carroll, Davies, & Richman, 1971; Corral, Ferrero, & Goikoetxea, Behavior Research Methods, 41, 1009–1017, 2009; Lété, Sprenger-Charolles, & Colé, Behavior Research Methods, Instruments, & Computers, 36, 156–166, 2004; Zeno, Ivens, Millard, Duvvuri, 1995), ESCOLEX provides four frequency indices for each grade: overall word frequency (F), index of dispersion across the selected textbooks (D), estimated frequency per million words (U), and standard frequency index (SFI). It also provides a new measure, contextual diversity (CD). In addition, the number of letters in the word and its part(s) of speech, number of syllables, syllable structure, and adult frequencies taken from P-PAL (a European Portuguese corpus-based lexical database; Soares, Comesaña, Iriarte, Almeida, Simões, Costa, …, Machado, 2010; Soares, Iriarte, Almeida, Simões, Costa, França, …, Comesaña, in press) are provided. ESCOLEX will be a useful tool both for researchers interested in language processing and development and for professionals in need of verbal materials adjusted to children’s developmental stages. ESCOLEX can be downloaded along with this article or from http://p-pal.di.uminho.pt/about/databases. 相似文献