Searched for: subject%3A%22Pattern%255C%2BRecognition%252C%255C%2BVisual%22
(1 - 10 of 10)
document
Kong, G. (author), Alais, D. (author), van der Burg, E.D. (author)
article 2017
document
Kong, G. (author), Alais, D. (author), van der Burg, E.D. (author)
In the present study, we examine how observers search among complex displays. Participants were asked to search for a big red horizontal line among 119 distractor lines of various sizes, orientations and colours, leading to 36 different feature combinations. To understand how people search in such a heterogeneous display, we evolved the search...
article 2016
document
Theeuwes, J. (author), Kramer, A.F. (author), Hahn, S. (author)
Previous research has shown that when searching for a color singleton. top-down control cannot prevent attentional capture by an abrupt visual onset. The present research addressed whether a task-irrelevant abrupt onset would affect eye movement behavior when searching for a color singleton. Results show that in many instances the eye moved in...
article 1999
document
Theeuwes, J. (author), Burger, R. (author), TNO Technische Menskunde (author)
Four experiments investigated whether a highly salient color singleton can be ignored during serial search. Observers searched for a target letter among nontarget letters and were instructed to ignore an irrelevant, highly salient color singleton that was either compatible or incompatible with the response to the target letter. The results...
article 1998
document
Mesland, B.S. (author), Wertheim, A.H. (author), TNO Technische Menskunde (author)
A visual illusion is reported which comprises the following: when a monitor with a moving constant velocity grating is swayed in front of a subject, the grating may be perceived as freezing or decelerating on the screen. This percept appears to depend on the magnitude and direction of the retinal grating velocity, relative to that of the moni...
article 1996
document
Groen, E.L. (author), Bos, J.E. (author), Nacken, P.F.M. (author), de Graaf, B. (author), TNO Technische Menskunde (author)
A new, automatic method for determination of human ocular torsion (OT) was devel-oped based on the tracking of iris patterns in digitized video images. Instead of quanti-fying OT by means of cross-correlation of circular iris samples, a procedure commonly applied, this new method automatically selects and recovers a set of 36 significant...
article 1996
document
Otten, L.J. (author), Gaillard, A.W.K. (author), Wientjes, C.J.E. (author), TNO Technische Menskunde (author)
Event-related brain potential (ERP), heart rate (HR), and blood pressure (BP) responses were examined during the 6s foreperiod of a choice-reaction task. Low and high trait-anxious males were required to make same/different judgements based on the similarity of two successively presented visual patterns. The pitch of a warning tone, presented at...
article 1995
document
Theeuwes, J. (author)
Two experiments were carried out to investigate the relation between exogenous and endogenous control of visual attention. Subjects searched for a target letter among three nontarget letters that were positioned on an imaginary circle around a fixation point. At different cue-display intervals, a centrally located arrowhead cue reliably...
article 1991
document
Theeuwes, J. (author)
Three visual search experiments tested whether top-down selectivity toward particular stimulus dimensions is possible during preattentive parallel search. Subjects viewed multielement displays in which two salient items, each unique in a different dimension—that is, color and intensity (Experiment 1) or color and form (Experiments 2 and 3)—were...
article 1991
document
Theeuwes, J. (author)
Early and late selection theories of visual attention disagree about whether identification occurs before or after selection. Studies showing the category effect, i.e., the time to detect a letter is hardly affected by the number of digits present in the display, are taken as evidence for late selection theories since these studies suggest...
article 1991
Searched for: subject%3A%22Pattern%255C%2BRecognition%252C%255C%2BVisual%22
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