The antisaccade task in a sample of 2,006 young males - II. Effects of task parameters

Smyrnis, N; Evdokimidis, I; Stefanis, NC; Constantinidis, TS; Avramopoulos, D; Theleritis, C; Paximadis, C; Efstratiadis, C; Kastrinakis, G; Stefanis, CN

dc.contributor.author	Smyrnis, N	en
dc.contributor.author	Evdokimidis, I	en
dc.contributor.author	Stefanis, NC	en
dc.contributor.author	Constantinidis, TS	en
dc.contributor.author	Avramopoulos, D	en
dc.contributor.author	Theleritis, C	en
dc.contributor.author	Paximadis, C	en
dc.contributor.author	Efstratiadis, C	en
dc.contributor.author	Kastrinakis, G	en
dc.contributor.author	Stefanis, CN	en
dc.date.accessioned	2014-03-01T01:52:11Z
dc.date.available	2014-03-01T01:52:11Z
dc.date.issued	2002	en
dc.identifier.issn	0014-4819	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26593
dc.subject	antisaccade	en
dc.subject	saccade	en
dc.subject	volitional saccade	en
dc.subject	reflex saccade	en
dc.subject	attention	en
dc.subject	inhibition	en
dc.subject	saccade programming	en
dc.subject	saccadic latency	en
dc.subject	frontal lobe	en
dc.subject	superior colliculus	en
dc.subject.classification	Neurosciences	en
dc.subject.other	POSITRON EMISSION TOMOGRAPHY	en
dc.subject.other	ANTI-SACCADE TASK	en
dc.subject.other	SUPERIOR COLLICULUS	en
dc.subject.other	NEURONAL-ACTIVITY	en
dc.subject.other	EYE-MOVEMENTS	en
dc.subject.other	PRO-SACCADES	en
dc.subject.other	PERFORMANCE	en
dc.subject.other	VOLUNTARY	en
dc.subject.other	FIELD	en
dc.title	The antisaccade task in a sample of 2,006 young males - II. Effects of task parameters	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Antisaccade performance was investigated in a sample of 2,006 young males as part of a large epidemiological study investigating psychosis proneness. This report summarizes the effects of task parameters on performance using a sample of 55,678 antisaccade trials collected from a subpopulation of 947 individuals. Neither the amplitude nor the latency of an error prosaccade in the antisaccade task was correlated with the latency of the ensuing corrective antisaccade that almost always followed an error. However, the latency of the corrective antisaccade decreased with increasing stimulus distance. Concerning the effects of specific task parameters, trials with stimuli closer to the central fixation point and trials preceded by shorter fixation intervals resulted in more errors and longer latencies for the antisaccades. Finally, there were learning and fatigue effects reflected mainly in the error rate, which was greater at the beginning and at the end of the 5-min task. We used a model to predict whether an error or a correct antisaccade would follow a particular trial. All task parameters were significant predictors of the trial outcome but their power was negligible. However, when modeled alone, response latency of the first movement predicted 40% of errors. In particular, the smaller this latency was, the higher the probability of an error. These findings are discussed in light of current hypotheses on antisaccade production mechanisms involving mainly the superior colliculus.	en
heal.publisher	SPRINGER-VERLAG	en
heal.journalName	EXPERIMENTAL BRAIN RESEARCH	en
dc.identifier.isi	ISI:000180860200008	en
dc.identifier.volume	147	en
dc.identifier.issue	1	en
dc.identifier.spage	53	en
dc.identifier.epage	63	en