Latency changes in the human visual evoked response to sinusoidal gratings

Parker, Denis M.; Salzen, Eric A.

doi:10.1016/0042-6989(77)90154-7

Cited by 131 publications

(37 citation statements)

References 15 publications

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“…Response latencies for all three conditions increased with spatial frequency. A similar delay in processing higher spatial frequencies has been found by recording visually evoked responses (e.g., Mihaylova, Stomonyakov, & Vassilev, 1999;Parker & Salzen, 1977) and using a perceptual matching task. Psychophysical work with simple sinewave gratings seems to indicate that coarse-scale information (e.g., contrasts at different orientations)becomes perceptually available before fine-scale information.…”

Section: Empirical Investigations Of Scale Processingmentioning

confidence: 71%

Usage of spatial scales for the categorization of faces, objects, and scenes

Morrison

Schyns

2001

Psychonomic Bulletin & Review

201

183

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Section: Empirical Investigations Of Scale Processingmentioning

confidence: 71%

Usage of spatial scales for the categorization of faces, objects, and scenes

Morrison

Schyns

2001

Psychonomic Bulletin & Review

201

183

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“…This is evidence for the existence of channels which prefer low spatial frequencies and which have shorter latencies and/or faster conduciton times than channels which prefer high spatial frequencies. Parker and Salzen (1977) obtained further evidence of this kind by showing that the latency of early components of the visual evoked response increased as the spatial frequency of the evoking stimulus, a sinusoidal grating, increased. Breitmeyer and Julesz (1975) compared contrast sensitivities for gratings which had abrupt temporal onsets to contrast sensitivities for gratings which had slow temporal onsets.…”

Section: Persistence In the Photoreceptorsmentioning

confidence: 93%

Iconic memory and visible persistence

Coltheart

1980

Perception & Psychophysics

924

706

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There are three senses in which a visual stimulus may be said to persist psychologically for some time after its physical offset. First, neural activity in the visual system evoked by the stimulus may continue after stimulus offset ("neural persistence"). Second, the stimulus may continue to be visible for some time after its offset ("visible persistence"). Finally, information about visual properties of the stimulus may continue to be available to an observer for some time after stimulus offset ("informational persistence"). These three forms of visual persistence are widely assumed to reflect a single underlying process: a decaying visual trace that (1) consists of afteractivity in the visual system, (2) is visible, and (3) is the source of visual information in experiments on decaying visual memory. It is argued here that this assumption is incorrect. Studies of visible persistence are reviewed; seven different techniques that have been used for investigating visible persistence are identified, and it is pointed out that numerous studies using a variety of techniques have demonstrated two fundamental properties of visible persistence: the inverse duration effect (the longer a stimulus lasts, the shorter is its persistence after stimulus offset) and the inverse intensity effect (the more intense the stimulus, the briefer its persistence). Only when stimuli are so intense as to produce afterimages do these two effects fail to occur. Work on neural persistences is briefly reviewed; such persistences exist at the photoreceptor level and at various stages in the visual pathways. It is proposed that visible persistence depends upon both of these types of neural persistence; furthermore, there must be an additional neural locus, since a purely stereoscopic (and hence cortical) form of visible persistence exists. It is argued that informational persistence is defined by the use of the partial report methods introduced by Averbach and Coriell (1961) and Sperling (1960), and the term "iconic memory" is used to describe this form of persistence. Several studies of the effects of stimulus duration and stimulus intensity upon the duration of iconic memory have been carried out. Their results demonstrate that the duration of iconic memory is not inversely related to stimulus duration or stimulus intensity. It follows that informational persistence or iconic memory cannot be identified with visible persistence, since they have fundamentally different properties. One implication of this claim is that one cannot investigate iconic memory by tasks that require the subject to make phenomenological judgments about the duration of a visual display. In other words, the so-called "direct methods" for studying iconic memory do not provide information about iconic memory. Another implication is that iconic memory is not intimately tied to processes going on in the visual system (as visible persistence is); provided a stimulus is adequately legible, its physical parameters have little influence upon its iconic memory. The paper concl...

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“…This spatiotemporal interaction has been demonstrated with reaction time (Breitmeyer, 1975), visible persistence (Meyer & Maguire, 1977), and cortical evoked potentials (Parker & Salzen, 1977). These spatiotemporal interactions seem to reflect a global-to-local mode of visual information processing.…”

mentioning

confidence: 96%

The effects of uniform field flicker and blurring on the global precedence effect

Lovegrove

Lehmkuhle

Baro

et al. 1991

Bull. Psychon. Soc.

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The involvement of low-level visual processes in the global precedence effect was investigated by selectively manipulating the low and high spatial frequency contribution by uniform field flicker masking and blurring, respectively. Uniform field flicker increased reaction times for the global stimuli and decreased reaction times for local stimuli. Blurring had little effect on reaction times for global stimuli but increased reaction times for local stimuli. The results support the proposal that the global precedence effect is partially a result of low-level visual mechanisms.In the human visual system, the rate of temporal processing decreases with increasing spatial frequency . This spatiotemporal interaction has been demonstrated with reaction time (Breitmeyer, 1975

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Latency changes in the human visual evoked response to sinusoidal gratings

Cited by 131 publications

References 15 publications

Usage of spatial scales for the categorization of faces, objects, and scenes

Usage of spatial scales for the categorization of faces, objects, and scenes

Iconic memory and visible persistence

The effects of uniform field flicker and blurring on the global precedence effect

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