Stabilized images: Dependent variable specificity of pattern-specific effects with prolonged viewing

Cosgrove, Mark P.; Schmidt, Marty J.; Fulgham, Dan D.; Brown, Donald R.

doi:10.3758/bf03206276

Cited by 14 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The order of eye of stimulus. The absence of orientation-specific effects in our data contradicts the results of other studies of stabilized image fading (Brown et al, 1973;Cosgrove et al, 1972;Schmidt et al, 1972;Schmidt et al, 1971;Sharpe, 1972;Wade, 1972Wade, , 1973aWade, , 1973b. Generally, it has been reported that horizontal and vertical lines exhibit more perceptual stability as stabilized targets than do lines of oblique orientations.…”

Section: Procedarecontrasting

confidence: 57%

“…Since afterimages often are considered to be equivalent to stabilized retinal projections, this result has potential theoretical importance. Stabilized retinal images have been used widely to study the involvement of basic neural mechanisms in human vision, especially the role of orientation and spatialfrequency-specific cortical units in contour perception (Brown, Schmidt, Fulgham, & Cosgrove, 1973;Cosgrove, Schmidt, Fulgham, & Brown, 1972;Schmidt, Fulgham, & Brown, 1971;Wade, 1972Wade, , 1973aWade, , 1973b. For this reason, the establishment of differences in the perception of stabilized retinal images in the dominant and the nondominant eyes could clarify the nature of the underlying neural substrate differences between the eyes.…”

mentioning

confidence: 99%

See 1 more Smart Citation

The relationship between sighting dominance and the fading of a stabilized retinal image

Porac

Coren

1982

Perception & Psychophysics

View full text Add to dashboard Cite

Section: Procedarecontrasting

confidence: 57%

mentioning

confidence: 99%

The relationship between sighting dominance and the fading of a stabilized retinal image

Porac

Coren

1982

Perception & Psychophysics

View full text Add to dashboard Cite

“…Also, acuity for line or grating stimuli is maximal for vertical or horizontal orientations (Andrews, 1967;Campbell, Kulikowski, & Levinson, 1966). Finally, earlier stabilized image studies in the present series (Cosgrove et al, 1972;Schmidt et al, 1971) have demonstrated that, in extended stabilized image viewing sessions, horizontal and vertical stimuli tend to resist fading to a greater degree than do diagonal stimuli.…”

Section: Resultsmentioning

confidence: 74%

Stabilized images: Functional relationships among populations of orientation-specific mechanisms in the human visual system

Schmidt¹,

Cosgrove²,

Brown³

1972

Perception & Psychophysics

Self Cite

View full text Add to dashboard Cite

“…Consequently, the decreased fragmentation frequency of vertical-horizontal line pairs found during steady fixation and optical stabilization most probably reflected the pattern of retinal image displacements. This point is of some importance, as the pattern of fading for optically stabilized lines has been attributed to the adaptation of cells within the visual system which respond specifically to line stimuli (Cosgrove, Schmidt, Fulgham, & Brown, 1972;Schmidt et al, 1971). While it is reasonable to assume that image disappearance is related to the adaptation of such line analyzers, attributing differential sensitivity to certain orientations on the basis of the pattem of such disappearance is questionable.…”

Section: Discussionmentioning

confidence: 99%

Figural effects in afterimage fragmentation

Wade

1974

Perception & Psychophysics

View full text Add to dashboard Cite

Afterimages consisting of between two and five lines were observed in five experiments. Measures were taken of both the duration and frequency of visibility of the lines comprising the configurations, and also of all line combinations. In Experiments I-III, lines forming angles, triangles, and a square were varied in orientation. Neither the absolute nor the relative orientation of the lines had any systematic effects on the measures. These results are compared with those that have been derived from steady fixation and optical stabilization, in which vertical-horizontal line pairs yield greater stability than other orientations. In Experiment rv, afterimages of the letters Nand Z were found to be more stable than those of their mirror-image reversals, both in terms of the duration of visibility of the entire configurations and the obliques. This pattern was not produced using a complex configuration that could fragment into either a letter or a reversed letter (Experiment V). Similar effects have been found during steady fixation.Paired lines observed under steady fixation or optical stabilization exhibit a high degree of stability when they are inclined at 90 deg to one another (McFarland, 1968; Schmidt, Fulgham, & Brown, 1971). This stability, as indexed by the low frequency of disappearance of the whole line pair, is greater than that for either acute or obtuse angled pairs. Furthermore, it has been shown that the stability of right angles in which the component sides are vertical and horizontal is greater than for perpendicular lines inclined at 45 deg to these axes (Schmidt et al, 1971). This latter result was interpreted in terms of the increased stability of the horizontal line components over other orientations.Single lines stabilized as prolonged afterimages do not evidence reliable duration or frequency differences with orientation (Wade, 1972). Consequently, it is of interest to de t ermine whether orientation is a salient differentiating dimension for afterimages of greater figural complexity. Three experiments are reported which examined the pattern of fragmentations of afterimages comprising two, three, or four lines. In each experiment, stimulus configurations were employed which varied the absolute orientation of the line components, and for two of the experiments their relative orientations were also varied.Furthermore, the stability of steadily fixated objects has been shown to be influenced by perceptual learning (Donderi & Kane, 1965: Tees & More, 1967 and by the verbal labeling of stimuli (McKinney, 1966). A similar effect was examined using afterimages of letters and their mirror-image reversals. A final experiment was conducted using a more complex stimulus configuration, the components of which could be either a letter or a reversed letter. METHOD ApparatusAfterimages were generated by the discharge of a Multiblitz ·This research was supported by a grant from the Science Research Council. I thank Kirsteen Greig for her assistance in the oollection and analysis of the data. Experiments IV...

show abstract

Stabilized images: Dependent variable specificity of pattern-specific effects with prolonged viewing

Cited by 14 publications

References 15 publications

The relationship between sighting dominance and the fading of a stabilized retinal image

The relationship between sighting dominance and the fading of a stabilized retinal image

Stabilized images: Functional relationships among populations of orientation-specific mechanisms in the human visual system

Figural effects in afterimage fragmentation

Contact Info

Product

Resources

About