The dichoptic viewing paradigm: Do the eyes have it?

Long, Gerald M.

doi:10.1037/0033-2909.86.2.391

Cited by 19 publications

(10 citation statements)

References 52 publications

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“…However, any cortical cell population earlier in the information processing sequence could, of course, also be responsible. Long (1979), in arecent critical review of the dichoptic viewing logic, argues that precortical mechanisms may not, after all, necessarily be precluded bya positive dichoptic result such as ours. He would argue that our result does not preclude the possibility that refraetoriness is a precortical phenomenon whose consequences affect binocular levels.…”

Section: Discussionmentioning

confidence: 76%

A psychoanatomical investigation of the locus of the mechanism responsible for the refractoriness of the visual vertex potential

Wastell

Kleinman

1980

Perception & Psychophysics

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Section: Discussionmentioning

confidence: 76%

A psychoanatomical investigation of the locus of the mechanism responsible for the refractoriness of the visual vertex potential

Wastell

Kleinman

1980

Perception & Psychophysics

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“…Long (1979) has argued that the presence or absence of interocular transfer is insufficient evidence on its own to indicate that the locus of ocular interaction is central or peripheral. In order to determine a central locus, spatial selectivity of the interaction must also be demonstrated.…”

Section: Resultsmentioning

confidence: 99%

“…Several studies have attempted to isolate the locus of the disinhibitory effect by utilizing dichoptic masking (Robinson, 1968;Turvey, 1973). However, interpretation of these results is difficult since identification of the locus of the interaction on the basis of the presence or absence of interocular effects is insufficient (see Long, 1979). If disinhibition arises as the direct result of an interchannel inhibitory process within feature detecting neurons, then the effect should be spatially restricted to the known receptive field properties (e.g., tuning ranges) of the neurons.…”

Section: N R Long and J G M Scheirlinckmentioning

confidence: 99%

Spatial disinhibition of orientation analyzers

Long

Scheirlinck

1981

Perception & Psychophysics

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Following the successive presentation of two masking gratings (M1 and M2), subjects were required to detect the presence or absence of a single vertical line (TS). When the orientations of the two masks were optimal, M1 was able to reduce the masking effect of M2 on the TS. For a vertical TS, disinhibition was maximal when the orientations of M1 and M2 were similar and was minimal when the orientational difference was greater than 15 deg. It is suggested that the spatial selectivity of the disinhibition function reflects the activity of neurons tuned to orientation, and that the disinhibition masking paradigm may be a useful psychophysical technique to measure tuning functions of other feature detectors.

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“…Walsh [ 181, using a dichoptic backward masking paradigm to measure central processing, found significantly longer ISI,s in a group of older subjects compared to a young control group. (Dichoptic stimulation, the presentation of the target stimulus to one eye, the masking stimulus to the other, has long been known to ensure minimal interaction between the two stimuli pdor to the cortical level; however, for a critical analysis, see [7]. ) Walsh investigated the effects of symmetrical letters composed of straight lines (eliminating only o and u).…”

Section: Dichoptic Backward Masking Of Letters Words and Trigrams Imentioning

confidence: 98%

Dichoptic backward masking of letters, words, and trigrams in old and young subjects

Cramer

1982

Experimental Aging Research

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Age differences in central visual processing were studied in 30 older adults (mean age 67.9 years) and in 30 young adults (mean age 19.8 years) using a dichoptic backward masking paradigm. Single letters, three-letter words, and consonant trigrams were used as target stimuli with a patterned masking stimulus. A significant age difference (p less than .001) was found in the interstimulus intervals necessary to escape the masking effect (ISIc) with older subjects requiring approximately 75 msec longer than the younger ones at each of three target durations. The effect of letters, words, and trigrams on ISIc for both young and old also yielded a significant difference (p = .01) with words most readily identified, letters intermediate, and trigrams requiring the longest processing time. Implications of these data with respect to previous studies and theoretical models are considered.

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The dichoptic viewing paradigm: Do the eyes have it?

Cited by 19 publications

References 52 publications

A psychoanatomical investigation of the locus of the mechanism responsible for the refractoriness of the visual vertex potential

A psychoanatomical investigation of the locus of the mechanism responsible for the refractoriness of the visual vertex potential

Spatial disinhibition of orientation analyzers

Dichoptic backward masking of letters, words, and trigrams in old and young subjects

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