Orientation-specific color aftereffects following imagination.

Interpretations of imagery-induced McCollough effects

“…If so, a forced-choice judgment was then given for the particular color seen; if not, their responses were scored as "0." Although this procedure was successful in resolving the McCollough effect established under perceptual conditions, it should be pointed out that the perceptual McCollough effect is fairly weak to begin with and that the imagery McCollough effect is weaker still (Finke & Schmidt, 1977). Hence, many of the subjects who reported not seeing colors on the test patterns in the imagery condition might yet have shown a McCollough effect had more stringent judgment methods been used.…”

“…I would like to comment on two articles, recently published in this journal (Broerse & Crassini, 1980;Kunen & May, 1980),which explored the finding that mental images can be used to establish the McCollough effect, reported by M. J. Schmidt and myself several years ago (Finke & Schmidt, 1977, 1978. In particular, I would like to examine the evidence provided in these recent studies pertaining to the proposal that imagined and observed patterns are functionally equivalent.…”

The VVIQ and imagery-induced McCollough effects: An alternative analysis

“…In view of the recent discussion (Broerse & Crassini, 1980Finke, 1981) of the relationship between self-ratings of vividness of visual imagery and imagery-induced McCollough effects (Finke & Schmidt, 1977, 1978Kunen & May, 1980;Kaufman, May, & Kunen, 1981), it seemed worthwhile to look again at the original data (Finke & Schmidt, 1978, Table I) and examine how unequivocally they support the conclusion that subjects with visual imagery self-rated as more vivid report stronger imageryinduced McCollough effects (lIMEs). The reanalysis suggests an alternative view of the data, and of other effects which follow adaptation to partially imaginary stimuli.…”

“…First, some reason must be given for the finding (Finke & Schmidt, 1977) that, after NOTES AND COMMENT 291 bar imagination, a majority of subjects guess that aftereffects should be negative and, after color imagination, that they should be positive. One possibility is that subjects learn from the afterimages of colored fields (seen during bar imagination between or at the edges of the stimuli) that aftereffects are negative.…”

Interocular transfer of orientation-contingent color aftereffects with external and internal adaptation

“…One of the most interesting recent developments regarding the establishment of pattern-contingent color aftereffects stems from the use of visual imagery during adaptation (Finke & Schmidt, 1977, 1978Kunen & May, 1980). In these investigations, subjects are asked to imagine different spatial patterns while they view actual nonpatterned chromatic fields.…”