Searched for: subject:"Perception"
(1 - 18 of 18)
document
Koelewijn, T. (author), Bronkhorst, A. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
Multisensory integration and crossmodal attention have a large impact on how we perceive the world. Therefore, it is important to know under what circumstances these processes take place and how they affect our performance. So far, no consensus has been reached on whether multisensory integration and crossmodal attention operate independently...
article 2010
document
Koelewijn, T. (author), Bronkhorst, A. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
There is debate in the crossmodal cueing literature as to whether capture of visual attention by means of sound is a fully automatic process. Recent studies show that when visual attention is endogenously focused sound still captures attention. The current study investigated whether there is interaction between exogenous auditory and visual...
article 2009
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van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
The majority of studies investigating interactions between vision and touch have typically explored single events, presenting one object at a time. The present study investigates how tactile-visual interactions affect competition between multiple visual objects in more dynamic cluttered environments. Participants searched for a horizontal or...
article 2009
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van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
Participants performed an attentional blink (AB) task including digits as targets and letters as distractors within the visual and auditory domains. Prior to the rapid serial visual presentation, a visual or auditory prime was presented in the form of a digit that was identical to the second target (T2) on 50% of the trials. In addition to the ...
article 2008
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van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Talsma, D. (author), Theeuwes, J. (author)
article 2008
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van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
Is an irrelevant audiovisual event able to guide attention automatically? In Experiments 1 and 2, participants were asked to make a temporal order judgment (TOJ) about which of two dots (left or right) appeared first. In Experiment 3, participants were asked to make a simultaneity judgment (SJ) instead. Such tasks have been shown to be affected...
article 2008
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van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
Searching for an object within a cluttered, continuously changing environment can be a very time-consuming process. The authors show that a simple auditory pip drastically decreases search times for a synchronized visual object that is normally very difficult to find. This effect occurs even though the pip contains no information on the location...
article 2008
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van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Koelewijn, T. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
The second of two targets is often missed when presented shortly after the first target—a phenomenon referred to as the attentional blink (AB). Whereas the AB is a robust phenomenon within sensory modalities, the evidence for cross-modal ABs is rather mixed. Here, we test the possibility that the absence of an auditory–visual AB for visual...
article 2007
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Theeuwes, J. (author), Kramer, A.F. (author), Atchley, P. (author), TNO Human Factors Research Institute (author)
Most accounts of visual perception hold that the detection of primitive features occurs preattentively, in parallel across the visual field. Evidence that preattentive vision operates without attentional limitations comes from visual search tasks in which the detection of the presence or absence of a primitive feature is independent of the...
article 1999
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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
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Theeuwes, J. (author), Kramer, A.F. (author), Hahn, S. (author), Irwin, D.E. (author), TNO Human Factors Research Institute (author)
We make rapid eye movements to examine the world around us. Before an eye movement is made, attention is covertly shifted to the location of the object of interest. The eye typically will land at the position at which attention is directed. Here we report that a goal-directed eye movement towards an object is disrupted by the appearance of a new...
article 1998
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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
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Theeuwes, J. (author), Atchley, P. (author), Kramer, A.F. (author), TNO Technische Menskunde (author)
Four experiments investigated whether directing attention to a particular plane in depth enables observers to filter out information from another depth plane. Observers viewed stereoscopic displays and searched for a red line segment among green line segments. The results showed that directing attention to a particular depth plane cannot prevent...
article 1998
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Theeuwes, J. (author), Kramer, A.F. (author), Hahn, S. (author), Waite, T. (author), TNO Technische Menskunde (author)
Purpose. To determine the extent to which endogenously controlled eye movements are affected by the sudden appearance of an irrelevant object (an abrupt onset). Previous research has shown that visual attention is captured by the appearance of a new object (e.g., Yantis, 1993). Methods. Observers had to make an eye movement to a predefined...
article 1997
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Theeuwes, J. (author), TNO Technische Menskunde (author)
The present studies investigated whether an isoluminant color change pops out, indicating that it can be detected preattentively in parallel. The results of Experi-ment 1 show that an abrupt color change presented on an equiluminant back-ground does not pop out. However, when the color change is accompanied by a small luminance change, it does...
article 1995
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Theeuwes, J. (author)
Three visual-search experiments tested whether the preattentive parallel stage can selectively guide the attentive stage to a particular known-to-be-relevant target feature. Subjects searched multielement displays for a salient green circle that had a unique form when surrounded by green nontarget squares or had a unique color when surrounded by...
article 1992
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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), Instituut voor Zintuigfysiologie TNO (author)
Two experiments were conducted which tested the effect of two different types of cues on the allocation of attention in the visual field. Subjects responded to a target appearing either 6.5° to the right or to the left of fixation in a field with small randomly positioned line segments. The target form was either a circle or diamond in which a...
article 1989
Searched for: subject:"Perception"
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