Perceptual Identification Task Research Articles

The effect of a prior presentation on temporal judgments in a perceptual identification task

Subjects read aloud words presented once at the rate of one per second. A perceptual identification task, involving 30- or 50-msec presentations, followed. Some of the words presented for identification had been read previously; others were new. After each presentation, in addition to identifying the word, the subjects judged its duration. The data indicate that a single presentation of a word affects its later perception, as revealed by enhanced perceptual identification, longer duration judgments, and better temporal discrimination. A second experiment showed that a single presentation influenced duration judgments even when identification was not required. The final experiment addressed the issue of what is preserved in memory from a prior presentation. The results from the three experiments indicate that duration judgments provide a valuable dependent measure of memory in the perceptual identification task and support the misattribution hypothesis: A prior presentation enhances perceptual identification, and this increase in relative perceptual fluency is incorrectly attributed to a longer presentation duration.

The effect of cue size on the utilization of partially valid cues in perceptual identification

A perceptual identification task with partially valid cues was presented to 35 college students. Size of cue was hypothesized to account for differences in cue utilization. Results indicate that size is a factor in the differential use of cues. The effect of stimulus intensity on attention is discussed as a possible underlying explanation. Suggestions for future research are offered.