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via ScienceDirect Publication: Acta Psychologica on 6/1/11
Publication year: 2011Source: Acta Psychologica, In Press, Corrected Proof, Available online 31 May 2011
Ming-Chou, Ho
The three experiments reported here test whether object-modulated attentional spreading can be obtained when the target location is 100% certain. Experiment 1 uses the reaction time (RT)-based flanker task similar to Shomstein and Yantis (2002), and replicates the null result of the object-modulated attentional spreading. RT and accuracy (ACC) have been shown to reflect different processes: postperceptual decision vs. perceptual process (Santee & Egeth, 1982). Experiment 2 adopts the data-limited ACC-based measure and reports that attention could spread within the attended object. To avoid ceiling effects, Experiment 3 adjusts the presentation time based on the trials where the target and...
Highlights: ► RT and accuracy reflect different processes: decision vs. perceptual process. ► ACC measure showed the object-modulated spreading in positional certainty condition. ► Convergent evidence was provided when the ceiling effect was controlled. ► RT measure is not proper to test this object-modulated spreading.
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