The functional relation of visual evoked response and reaction time to stimulus intensity

Vaughan, Herbert G.; Costa, Louis D.; Gilden, Lloyd

doi:10.1016/0042-6989(66)90076-9

Cited by 228 publications

(78 citation statements)

References 22 publications

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“…The common two-peaked waveform is replaced by one component, a rather slow positive-going shift. Vaughan has interpreted this as an indication of a shift from photopic to scotopic mechanisms (Vaughan, 1966). While this is a very plausible explanation, ik is important to point out that as the intensity is reduced to very low levels, the subject's task becomes considerably more difficult.…”

Section: Average Evokjcd Potential8mentioning

confidence: 99%

“…At higher intensities, the P, amplitude somewhat exceeds that of 0,. Thus 0, is negative with regard to P,, and the bipolar record shows a negative potential.Thus we conclude, as did Vaughan (1966), that bipolar recording methods introduce uninterpretable distortions into evoked response records. The distortions are more serious in cross-modality comparison.…”

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confidence: 92%

“…Thus we conclude, as did Vaughan (1966), that bipolar recording methods introduce uninterpretable distortions into evoked response records. The distortions are more serious in cross-modality comparison.…”

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confidence: 92%

“…I suggested that, by suitable application of the averaging procedure, it should be possible to detect and analyze separately the sensory and motor components of sensorimotor sequences and to approach directly the problem of the central correlates of human perceptual and cognitive processes (Vaughan, 1962). This presumption has received substantial empirical support (e.g., Vaughan and Costa, 1964;Vaughan et al, 1966 ;Gilden et al, 1966;. Since cerebral processes may be related to voluntary movement and to relatively stimulus-independent psychological processes (e.g., Ritter et al, 1968), the term "evoked potentials" is no longer sufficiently general to apply to all E E G phenomena related to sensorimotor processes.…”

Section: Average Evoked Potentialsmentioning

confidence: 99%

“…Some answers to these questions already emerge from the study of the E R P in man. I n the visual modality, the VER has permitted us to define cortical events specifically related to geniculocalcarine input to striate cortex (Vaughan and Katzman, 1964; Vaughan and Gross, 1966) ; to brightness perception (Vaughan and Hull, 1965 ;Vaughan, 1966) ; to spectral sensitivity and other aspeots of foveal vision (DeVoe et al, 1968) ; to the suppression of pattern vision during saccadic eye movements (Gross et al, 1967) ; to metacontrast suppression (Vaughan and Silverstein, 1968) ; and to motor responses to photic stimulation (Vaughan et al, 1965a, b) . None of the direct q~anti~tative correlations that have been possible in the human subject have been obtained, to my knowledge, with microelectrode recordings in experimental animals.…”

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confidence: 99%

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Average evoked potentials: Methods, results, and evaluations.

Donchin

Lindsley²

1969

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to discuss current problems in the study of average evoked potential. As can be seen from %he list of participants, most laboratories, in &his country and abroad, thak aotively use signal-averaging techniques in processing electroencephalographic records were represented at the conference. Our objective in organizing this conference was to provide a forum for discussing the problems involved in conducting these gtudies and in communicating the results of experiments.For this purpose, the conference was organized in the following format. Six investigators were invited to prepare critical reviews of the literature-each on one of six assigned topics. The reviews mere made available to all the conference participants 4 to 6 weeks before the conference. Each review was to serve as the text for one &hour session at the conference. The reviewer was allotted 20 minutes to restate some of the main points presented in ahis paper; then discussion was opened to all participants. The discussions were moderated in each case by an assigned discussant.Chapters 2 through 7 present the review papers and the ensuing discussion. The remarks made by the reviewer were deleted since their substance is presented in the review.All the principal speakers completed their assignment on time, and the reviews were sent to the participants. However Dr. Vaughan's report, as included in this volume, is substantially differen6 from the document that he circulated to the participants. For this reason, the discussants ignore much of the material presented in his present chapter.I n addition to the working sessions of the conference, two evening sessions featured extended presentations. I n the first one, Dr. Lindsley surveyed the evoked potential technique, its history, and achievements; in the second one, Dr. Frank Morrell discussed the neurophysiological mechanisms underlying the average evoked response. Dr. Lindsley's talk provided the material for Chapter 1. A supplement contains m IV FOREWORD reports that were submitted by participants to expand and elaborate upon some of the comments they made in the discussion.The conference would not have been possible without the support of the O5ce of Space Science and Applications, NASA Headquarters and Dr. Orr Reynolds. Dr. Norman Weissman of NASA Headquarters was instrumental in providing support, both in the organization of the conference and in the publication of the Proceedings. His patience and understanding are deeply appreciated. Ames Research Center, where at the time I held a National Research Council Resident Research Associateship, provided much necessary help. Dr. Jorge Huertas was especially considerate. The organization of the conference down to the last detail was in the very capable hands of Mrs. Mary-Frances Thompson of the American Institute of Biological Sciences. Special thanks are due her for the magnificent job she has done.Since we have deleted all the chairman's non-technical remarks, the Proceedings fail to underline the able chairmanship provided by Dr. D. B. Lindsley, who ran...

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Section: Average Evokjcd Potential8mentioning

confidence: 99%

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confidence: 92%

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confidence: 92%