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

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.…”

“…If subjects were already imagining colors to give apparent lIMEs, instructions to imagine those colors should have little effect on color settings. One reason for taking this notion seriously is that interocularly transferred lIMEs are apparently negative (Kaufman, May, & Kunen, 1981), and that lIMEs are contingent on the orientation of check edges, rather than of the fundamental spatial frequency of checkerboards, unless the to-be-imagined checkerboard is blurred during its preexperimental presentation to the subject (Kunen & May. 1980).…”

“…The above analysis of their VVIQ-related data suggests why subjects who report strong negative lIMEs after bar imagination also report strong positive lIMEs after color imagination. Second, an alternative account of the data of Kaufman, May, and Kunen (1981) and Kunen and May (1980) must be given. After bar imagination, these authors found negative lIMEs which they measured with a color-cancellation technique.…”

Age-related differences in the magnitude of pattern-contingent color aftereffects

“…It has the advantage of allowing the measurement of aftereffect magnitude and mitigates response bias typically associated with verbal report techniques. In a series of experiments (Kaufman, May & Kunen, 1981;Kunen & May, 1980;May & Matteson, 1976;May, Matteson, Agamy & Castellanos, 1978) using checkerboard adaptation stimuli and grating test stimuli, it has been well established that pattern-eontingent color aftereffects are mediated by the fundamental Fourier components of such stimuli in adults. One of the purposes of the present study was to determine whether young children show similar aftereffects, and to compare the magnitude of such aftereffects across a wide range of ages.…”

Mystery of the anti-McCollough effect

“…While it is well known that contingent color aftereffects induced in one eye do not transfer to the other eye, it has nonetheless been reported that first testing the induced eye before testing the noninduced eye reveals transfer (Shute, 1979). In addition, by using diffuse white light rather than covering the noninduced eye during adaptation, interocular transfer occurs (Kaufman, May, & Kunen, 1981;Shute, 1979). While it is a reasonable assumption that Sheth and Shimojo used the same test procedure for all of their conditions (they do not report details of the interocular testing), the scattered findings in the literature suggest that procedural factors can be influential for transfer from one eye to the other and, therefore, do not necessitate an interpretation based on a high-level effect.…”