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Wythe L. Whiting David J. Madden Thomas W. Pierce Philip A. Allen 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2005,58(1):72-97
Previous investigations of adult age differences in visual search suggest that an age-related decline may exist in attentional processes dependent on the observer's knowledge of task-relevant features (top-down processing). The present experiments were conducted to examine age-related changes in top-down attentional guidance during a highly efficient form of search, singleton detection. In Experiment 1 reaction times to detect targets were lower when target features were constant (feature condition) than when target features were allowed to vary between trials (mixed condition), and this reaction time benefit was similar for younger and older adults. Experiments 2 and 3 investigated possible interactions between top-down and bottom-up (stimulus-driven) processes. Experiment 2 demonstrated that search times for both age groups could be improved when targets varied on an additional feature from distractors (double-feature condition) but only when top-down control was available (feature search). In Experiment 3, the availability of top-down guidance enabled both younger and older adults to override the distracting effects of a noninformative spatial location cue. These findings indicate that top-down attentional control mechanisms interact with bottom-up processes to guide search for targets, and that in the context of singleton detection these mechanisms of top-down control are preserved for older adults. 相似文献
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William D. Pierce Ph.D. 《American journal of community psychology》1975,3(3):287-288
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The purpose of this study was to conduct a meta‐analysis of computer‐mediated interventions (CMIs) aimed at changing theoretical mediators of safer sex. Meta‐analytic aggregation of effect sizes from k = 20 studies indicated that CMIs significantly improved HIV/AIDS knowledge, d = .276, p < .001, k = 15, N = 6,625; sexual/condom attitudes, d = .161, p < .001, k = 12, N = 5,816; and condom self‐efficacy, d = .186, p < .001, k = 10, N = 3,308. Although assessed in fewer studies, CMIs also significantly increased perceived susceptibility, condom communication, and condom intentions. Effect sizes were found to be of similar magnitude to human‐delivered interventions. Exploratory analysis of moderating influences detected few significant variables. Implications for the development and testing of CMIs are discussed. 相似文献
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Irene Pierce Stiver PhD Wendy Rosen PhD LICSW Janet Surrey PhD Jean Baker Miller MD 《Women & Therapy》2013,36(2-4):7-29
SUMMARY Creative moments in therapy are those occasions when something new and growth-fostering occurs. This article offers three illustrations and a discussion of these characteristics. It is based on a panel discussion held at the Stone Center-Harvard Medical School/Cambridge Hospital “Learning from Women Conference” in April, 2000. 相似文献
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Shu-Hong Zhu Jichao Sun Sally Hawkins John Pierce Sharon Cummins 《Health psychology》2003,22(3):245-252
This study used 1 longitudinal and 2 cross-seconal population surveys to compare stability of low-rate daily smokers (less than 5 cigarettes per day) with other daily smokers and occasional smokers. Few low-rate smokers maintained consumption level; 36% retained smoking status after 20 months, compared with 82% and 44% for regular daily and occasional smokers, respectively. In a dynamic process, established smokers quit smoking and/or modified (decreased or increased) consumption. Low-rate and occasional smokers quit at higher rates than regular daily smokers (odds ratios 3:1) but were replenished by new members, many converted from regular daily smoker. The overall trend is an increasing proportion of low-consumption smokers while smoking prevalence declines. The dynamic process has implications for tobacco control efforts and for addiction theory. 相似文献