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291.
Modern theory explains visual selective attention as a competition for receptive fields in the extrastriate cortex. The present study examined whether this competition contributes to older adults' difficulty in processing visual clutter. In 2 experiments, young and older adult subjects made same-different judgments of target shapes in displays with or without clutter. The target shapes were either high or low in discriminability. The spatial separation between targets varied across trials, and the effects of competitive selection were gauged through decrements in task performance that resulted as separation decreased. Both age groups showed a competition-in-clutter effect, evincing a stronger influence of target separation within cluttered displays. However, the costs of clutter in general and the strength of the competition-in-clutter effect more specifically were both substantially larger for older adults. Effects of clutter and competition also varied with stimulus discriminability; judgments of highly discriminable stimuli evinced no intertarget competition in uncluttered displays for either age group, while judgments of less discriminable stimuli showed competition whether clutter was present or not. Results suggest that clutter disproportionately degrades older adults' visual performance by forcing more careful stimulus resolution, engendering stronger competition for selection. (PsycINFO Database Record (c) 2012 APA, all rights reserved). 相似文献
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Kramer 《Psychological research》1925,6(1):432-433
Ohne Zusammenfassung 相似文献
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C H Kramer 《The Psychoanalytic quarterly》1967,36(2):260-270
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Identification,Response, and Referral of Suicidal Youth Following Applied Suicide Intervention Skills Training
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Cynthia J. Ewell Foster PhD Amanda N. Burnside BA Patricia K. Smith MS Anne C. Kramer LMSW Allie Wills BA Cheryl A. King PhD 《Suicide & life-threatening behavior》2017,47(3):297-308
Gatekeeper training is a public health approach to suicide prevention that encourages community members to identify those at risk for suicide, respond appropriately, and refer for clinical services. Despite widespread use, few studies have examined whether training results in behavior change in participants. This study employed a naturalistic pre–post design to follow 434 participants in Applied Suicide Intervention Skills Training, finding small but significant increases in self‐reported identification of at‐risk youth, some helpful responses to youth, and numbers of youth referred to treatment from pre‐test to 6‐ to 9‐month follow‐up. Changes in active listening and helping behaviors meant to support treatment referrals (such as convincing a youth to seek treatment) were not observed over time. Additional analyses explored predictors of self‐reported skill utilization including identification as a “natural helper” and attitudes about suicide prevention. 相似文献