Titre :

Saccade latencies in an overlap paradigm when manipulating the stimuli timing, energy and transient changes

Auteur(s) :

Vencato, Valentina [Auteur]
Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 [SCALab]
Harwood, Mark R [Auteur]
City College of New York [CUNY] [CCNY]
Madelain, Laurent [Auteur]
Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 [SCALab]

Titre de la manifestation scientifique :

Vision Sciences Society

Ville :

St. Pete Beach, Florida

Pays :

Etats-Unis d'Amérique

Date de début de la manifestation scientifique :

2017-05-18

Titre de la revue :

Journal of Vision

Date de publication :

2017-08

Discipline(s) HAL :

Sciences cognitives

Résumé en anglais : [en]

Previous studies showed that a temporal overlapping of the fixation-target with the saccade-target onset induces a shift of saccade reaction time distributions towards longer values. Here we present a series of experiments ...
Lire la suite >Previous studies showed that a temporal overlapping of the fixation-target with the saccade-target onset induces a shift of saccade reaction time distributions towards longer values. Here we present a series of experiments probing how an overlap paradigm, combined with the manipulation of stimuli durations, energy and transient changes might modulate saccadic reaction time distributions. We recorded saccadic reaction time in four participants in six experiments in which a saccade-target appeared at a random amplitude after a fixation period. First we parametrically manipulated the duration of the overlap using a range of intervals (from 0 to 200 ms). In a second experiment we probed the interaction of various foreperiod intervals (i.e. the duration of the fixation period prior to saccade-target onset) and overlap using two overlap intervals (20 or 140 ms). In two additional experiments we manipulated either the stimuli sizes or their contrasts in overlap paradigms (20 or 140 ms). Lastly, we introduced a visual transient during the overlap interval via two manipulations (both with a range of SOA): either a distractor ring appeared around the fixation-target, or dynamic random noise replaced the fixation-target. Results show reliable modifications in the latency distributions depending on the overlap interval as well as idiosyncratic differences. Furthermore, all our additional experimental manipulations also affected the latency distributions revealing strong interacting inhibitory processes. We conclude that the effects of overlap intervals may combine with the influence of other stimuli properties to produce strong effects on decision process.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Projet Européen :

Perception and Action in Complex Environments

Établissement(s) :

Université de Lille
CNRS
CHU Lille

Collections :

• Sciences Cognitives et Sciences Affectives (SCALab) - UMR 9193

Équipe(s) de recherche :

Équipe Action, Vision et Apprentissage (AVA)

Date de dépôt :

2019-02-13T14:21:40Z
2020-04-08T12:10:50Z
2021-06-04T07:52:07Z
2021-06-29T08:27:55Z