葉怡玉2006-07-252018-06-282006-07-252018-06-281998http://ntur.lib.ntu.edu.tw//handle/246246/9639本研究重複並沿伸Geisler & Chou (1995)的理想觀察模式及研究方法探討低階因素在視覺搜尋作業歷程中所扮演的角色。研 究結果顯示：(1)此研究方法在多數情況下預測非常精準，但也可能有其限制。在異質背景色彩的情境下，異質性無法促進區 辨卻可增加搜尋的效率。因此區辨表現的排序不能對應於搜尋表現的排序而違反該模式的預測。(2)在同樣的物理相似性下，背景刺激的知覺組合或目標與臨近刺激的突現屬性都影響低階處理歷程而進一步影響視覺搜尋。(3)信號-雜訊比例較搜尋的類別更為影響區辨與搜尋表現。The present research replicates and generalizes Geisler and Chou’s (1995) ideal observer model to investigate the influence of low-level factors in a variety of visual search tasks. The results showed the follows: (1) their approach is generalizable to many conditions and yet is limited in predicting the order involved conditions where color homogeneity among background stimuli was manipulated. Heterogeneous colors cannot be used to enhance discrimination performance but reduce effective display setsize in visual search. Consequently, the rank order of discrimination performance cannot be mapped unto the rank order of search performance – violating the prediction of the model. (2) at the same similarity level, perceptual grouping among background stimuli or emergent features combined from the target and nearby stimuli enhances performance at both low and high levels. (3) signal-noise ratio may be more important in determining performance than whether search is in the category of feature or conjunctive search.application/pdf34647 bytesapplication/pdfzh-TW國立臺灣大學心理學系暨研究所視覺搜尋低階區辨知覺組合visual searchdiscriminationperceptual groupingreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/9639/1/862413H002010.pdf