Attentional Capture as an Alternative view of Perceptual Load Theory and Early-Visual Crosstalk Account

서지정보

· 발행기관 : 한국인지및생물심리학회
· 수록지 정보 : 한국심리학회지: 인지 및 생물 / 27권 / 2호 / 121 ~ 149페이지
· 저자명 : 서지현, 조양석

초록

The perceptual load theory (Lavie & Tsal, 1994) and the dilution account (Tsal & Benoni, 2010) have been proposed to explain the phenomenon that the degree of irrelevant information processing decreases as the relevant stimulus-set size increases. The present study investigated the nature of the set-size effect on processing of task-irrelevant information. Under high perceptual load with a single distractor, no congruency effect was replicated in the present study. However, importantly, the congruency effect increased as the number (ratio) of distractor increased (Experiments 1 & 2). In dilution condition (Experiment 3), a larger congruency effect was found when a conflict distractor was located at the task-relevant array than at a task-irrelevant peripheral position, which is consistent with previous findings. However, an additional presentation of a distracting letter did not produce a larger congruency effect. These results indicate that the perceptual load effect by increasing the number of task-relevant items is a result of a reduced probability of attentional capture by a conflicting distractor. Furthermore, this selective processing occurs at a focused attention stage which implies that early-visual crosstalk is not an alternative explanation.

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