표적 단서와 탐색 배열 출현 시점 사이의 시간 간격이 표적 형판 형성에 미치는 영향

초록

This study investigated whether or not the length of the time that was given for forming a search target template could affect subsequent search performance in both simple feature search and conjunction search tasks. To accomplish this, we manipulated the inter-stimulus interval (ISI), the time interval between an offset of a pre-cue and subsequent onset of a search array, to 50ms, 500ms and 1500ms in Experiment 1, and to 100ms, 300ms, 500ms and 700ms in Experiment 2. In Experiment 1, the search RTs were rather constant despite the extended ISIs in both the color and orientation simple feature search conditions. However, the RTs became faster as the ISIs were extended in the color-orientation conjunction search condition. In Experiment 2, benefit of the extended ISIs were found in all search conditions when the orientation feature search task was replaced with a Landolt gap search task. Especially, the results showed that search could be faster if the ISIs are extended to maximum 300ms in the simple feature search, whereas if they are extended to maximum 500ms in conjunction search. These results indicate that the type of a target template formed by pre-cues can affect the minimum time to complete a subsequent search task.

키워드