Transitivity of visual judgments of simultaneity.

Corwin, Thomas R.; Boynton, Robert M.

doi:10.1037/h0026617

Cited by 25 publications

(16 citation statements)

References 5 publications

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“…hemisphere, while depth perception mainly is achieved by the right one (Durnford & Kimura, 1971). Corwin and Boynton (1968) and Efron (1963) have argued from their data that a common "simultaneity center" for all sensory modalities possibly is located in the dominant hemisphere. If this is true, then information projected onto the right hemisphere must have at least one extra neural stage to go through, and hence may end up with a greater variability than information projected directly onto the left hemisphere.…”

Section: Discussionmentioning

confidence: 99%

Discrimination of visually perceived intervals of time

Oostenbrug

Horst

Kuiper

1978

Perception & Psychophysics

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The discrimination of short intervals of time, demarcated by a foveally presented spatially distinct double pulse of light, was studied under several conditions of pulse intensity, angular diameter, and duration. We defined temporal acuity as a measure of discrimination capacity in terms of d' values. It is shown that the acuity mechanism uses largely integrated information-in the spatial and temporal domain, up to at least 56' and 32 msec, respectively. Acuity increases slightly with increasing integrated pulse energy, but seems quite independent of the presence of an adapting field of appreciable brightness. Studies on the effect of the foveal site aimed at by the pulses of light have shown that temporal projections lead to significantly poorer acuity values than nasal projections. Monoptic and dichoptic stimulation, however, are fully equivalent.

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Section: Discussionmentioning

confidence: 99%

Discrimination of visually perceived intervals of time

Oostenbrug

Horst

Kuiper

1978

Perception & Psychophysics

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“…Explicit manipulations of directed attention in tasksrequiring temporal-orderjudgments have shown that the perception of temporal order may be, influenced by attention when stimuli are presented ln different sensory modalities (Sternberg, Knoll, & Gates, 1971) within the auditory modality (Needham, 1936), ln vision, there is indirect evidencesuggestingthat attention may influence the perception of temporal order of visual stimuli (Corwin & Boynton, 1968;Sekuler, 1976;Sekuler, Tynan, & Levinson, 1973). Corwin and Boynton (1968) found that when a foveal stimulus is presented simultaneously with a , peripheral stimulus, the fovealstimulusappearsto oecurtirst (see also Rutschmann, 1966).…”

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confidence: 99%

Directed attention and perception of temporal order.

Stelmach¹,

Herdman²

1991

Journal of Experimental Psychology: Human Perception and Perfor

251

297

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The present research examined the effects of directed attention on speed of information transmission in the visual system. Ss judged the temporal order of 2 stimuli while directing attention toward 1 of the stimuli or away from both stimuli. Perception of temporal order was influenced by directed attention: Given equal onset times, the attended stimulus appeared to occur before the unattended stimulus. Direction of attention also influenced the perception of simultaneity. The findings support the notion that attention affects the speed of transmission of information in the visual system. To account for the pattern of temporal order and simultaneity judgments, a model is proposed in which the temporal profIle of visual responses is affected by directed attention.ln current models of directed attention, attention is assumed to influence the speed at which information is transmitted through the visual system. For example, in spotlight (or beam) (LaBerge, 1983;Posner, Snyder,& Davidson, 1980) and zoom (Eriksen & St. James, 1986;Eriksen & Yeh, 1985) models, directing attention increases the transmission speed of visual information because the allocation of resources to the cued location increases. ln gradient models (LaBerge & Brown, 1989;Shaw, 1978), a gradient of attention that is centered and maximal at the attended location modulates the speed at which information is allowed to pass from a feature register to subsequent' stages of processingin the perceptual system. Information flow is presumed to be greatest at the attended location because resources are abundant.The purpose of the present research was to examine the assumption that attention nibdulates the speedof information transmission in the visual system. This was done by manipulating the direction of attention while requiring observersto judge the temporal order of two stimuli. We used the temporal-order task because it provides a sensitiveindex of information transmission speed (Sternberg& Knoll, 1973;Ulrich, 1987).Explicit manipulations of directed attention in tasksrequiring temporal-orderjudgments have shown that the perception of temporal order may be, influenced by attention when stimuli are presented ln different sensory modalities (Sternberg, Knoll, & Gates, 1971) or when stimuli are presented

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“…Most are not applicable; some, for examiple, used dichoptic viewing (Robinson, 1967) or presented the two stimuli to different visual half-fields (Corwin and Boynton, 1968;Efzon, 1963;Hirsch and Sherrick, 1961;Lichtenstein, 1961;Rutschmann, 1966Rutschmann, , 1973Swaet, 1953). Many reported 50% thresholds, which seems inappropriate for the present problem: as a practical matter, we cannot be satisfied with Westheimer and Mcgee (1977) reported the study most relevant to the pr~esent proble~m.…”

Section: Luria Na 4al Submarine Medical Research Laboratory Abstractmentioning

confidence: 99%

Proceedings of the Symposium on Psychology in the Department of Defense (12th) Held in Colorado Springs, Colorado on 18-20 April 1990

Lindsley¹

1990

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Transitivity of visual judgments of simultaneity.

Cited by 25 publications

References 5 publications

Discrimination of visually perceived intervals of time

Discrimination of visually perceived intervals of time

Directed attention and perception of temporal order.

Proceedings of the Symposium on Psychology in the Department of Defense (12th) Held in Colorado Springs, Colorado on 18-20 April 1990

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