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Sun, Meng; Zhang, Xiaorong; Wang, Jiangmeng; Liu, Hailan; Zhang, Qin; Cui, Lixia – SAGE Open, 2020
This study explored whether the color of letters could influence letter discrimination task performances and whether this effect of color could be modulated by processing level (global vs. local) and attention level of color (color-attended vs. color-unattended). We used the Navon letters in red, green, or white as stimuli at a relatively small…
Descriptors: Color, Cognitive Processes, Attention, Alphabets
Guzman-Martinez, Emmanuel; Grabowecky, Marcia; Palafox, German; Suzuki, Satoru – Journal of Experimental Psychology: Human Perception and Performance, 2011
Visual spatial attention can be exogenously captured by a salient stimulus or can be endogenously allocated by voluntary effort. Whether these two attention modes serve distinctive functions is debated, but for processing of single targets the literature suggests superiority of exogenous attention (it is faster acting and serves more functions).…
Descriptors: Visual Discrimination, Spatial Ability, Color, Alphabets
Ratcliff, Roger; Smith, Philip L. – Journal of Experimental Psychology: General, 2010
The authors report 9 new experiments and reanalyze 3 published experiments that investigate factors affecting the time course of perceptual processing and its effects on subsequent decision making. Stimuli in letter-discrimination and brightness-discrimination tasks were degraded with static and dynamic noise. The onset and the time course of…
Descriptors: Cognitive Processes, Decision Making, Visual Discrimination, Color