Abstract
The effects of stimulus probability were investigated on the late components of saccade-related brain potentials (lambda responses) in two paradigms, ‘counting’ and ‘guessing.’ Subjects performed saccadic eye movements from a middle light to the target area where one of three kinds of target light stimuli appeared in a randomized sequence, each with a different probability (0.17, 0.33, and 0.50). Brain activity was recorded from six scalp areas. In the counting task subjects were instructed to count the prespecified low-probability stimuli. In the guessing experiment they had to make a guess before each trial as to which kind of target stimulus would appear. In both experiments the late positive components showed significantly greater amplitude in the lambda responses associated with infrequent stimuli than in those elicited by frequent stimuli. Principal component-Varimax analysis of the lambda responses revealed factors corresponding to the P300 and the slow wave components of traditional evoked potential studies.
Similar content being viewed by others
References
Barlow JS: Brain information processing during reading: Electrophysiological correlates. Dis Nerv Syst 32:668–672 1971
Cooper R, McCallum WC, Newton P, Papakostopoulos D, Pocock PV and Warren WJ: Cortical potentials associated with the detection of visual events. Science 196:74–77 1977
Donchin E and Heffley E: Multivariate analysis of event-related potential data: a tutorial review. In Otto DA (ed.). Multidisciplinary Perspectives in Event-Related Brain Potential Research, U.S.G.P.O., Washington, D.C., EPA-600/9–77–043:555–572 1978
Duncan-Johnson CC and Donchin E: On quantifying surprise: the variation of event-related potentials with subjective probability. Psychophysiology 14:456–467 1977
Marton M, Szirtes J and Donauer N: A comparative study of averaged lambda potentials to eye movements. In Sinz R and Rosenzeig MR (eds.). Psychophysiology 1980, 379–389. Fisher Verlag Jena and Elsevier Biomedical Press, Amsterdam, 1983
Ruchkin DS, Sutton S and Stega M: Emitted P300 and slow wave event-related potentials in guessing and detection tasks. Electroencephalogr Clin Neurophysiol 49:1–14 1980
Squires KC, Donchin E, Herning RI and McCarthy G: On the influence of task relevance and stimulus probability on event-related potential components. Electroencephalogr Clin Neurophysiol 42:1–14 1977
Sutton S, Braren M, Zubin J and John ER: Evoked potential correlates of stimulus uncertainty. Science 150:1187–1188 1965
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Marton, M., Szirtes, J. & Breuer, P. Late components of lambda responses in cognitive tasks. Doc Ophthalmol 59, 199–204 (1985). https://doi.org/10.1007/BF00160616
Issue Date:
DOI: https://doi.org/10.1007/BF00160616