Effect of position and typeface variation on perceptual clarity
Tóm tắt
To determine if S’s ability to perceive and to recognize a letter would increase with well spaced repetitions, even if the position and I or the typeface changed from flash to flash, four Ss were shown six flashes of single letters and were asked to guess the letter and to indicate whether or not they saw it clearly. Recognition (measured by both forced-choice guesses and by perceptual reports) increased at a constant rate whether an identical test letter was flashed on each trial or the form and/or position of the letter was varied (over four levels each) between flashes. The mean level of recognition was also unimpaired by variations in typeface and I or position, when measured by forced-choice guesses. With a perceptual report, recognition was lowered by variation of the test stimulus, apparently through a change in report criterion. These data suggest that the perceptual repetition effect must operate through arousal of the letter name or some other representation of the stimulus rather than by a simple sensory facilitation.
Tài liệu tham khảo
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