McKeeWestheimer78
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Improvement in vernier acuity with practice
McKee & Westheimer (1978). Improvement in vernier acuity with practice. Perception & Psychophysics, 24(4): 258–262.
McKeeWestheimer78.pdf
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Abstract
The ability to detect small differences in the positions of two lines (vernier acuity) showed some improvement with practice in all eight subjects, even for subjects given no error feedback. The average decline in threshold with training {2,000-2,500 responses) was about 40%. We used three target orientations: vertical, horizontal, and right oblique. Orientational differences remained stable in only one subject. In five subjects, orientational differences present at the beginning of training diminished or disappeared with increased experience; in two, they increased.
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