Searched for: subject:"Perception"
(1 - 20 of 23)

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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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Zekveld, A.A. (author), Kramer, S.E. (author), Kessens, J.M. (author), Vlaming, M.S.M.G. (author), Houtgast, T. (author), TNO Defensie en Veiligheid (author)
This study examined the subjective benefit obtained from automatically generated captions during telephone-speech comprehension in the presence of babble noise. Short stories were presented by telephone either with or without captions that were generated offline by an automatic speech recognition (ASR) system. To simulate online ASR, the word...
article 2009
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Brouwer, A.-M. (author), Knill, D.C. (author), TNO Defensie en Veiligheid (author)
We investigated whether humans use a target's remembered location to plan reaching movements to targets according to the relative reliabilities of visual and remembered information. Using their index finger, subjects moved a virtual object from one side of a table to the other, and then went back to a target. In some trials, the target shifted...
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 Erp, J.B.F. (author), TNO Defensie en Veiligheid (author)
Vibrotactile mobility systems present spatial information such as the direction of a waypoint through a localized vibration on the torso. Using these systems requires the ability to determine the absolute location of the stimulus. Because data are available only on the ability to determine the relative location of stimuli on the torso, we...
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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Vladusich, T. (author), Lucassen, M.P. (author), Cornelissen, F.W. (author), TNO Defensie en Veiligheid (author)
article 2006
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van Erp, J.B.F. (author), van Veen, H.A.H.C. (author), TNO Defensie en Veiligheid (author)
Orienting oneself in space is not an easy task. On Earth, we combine visual, vestibular and pressure cues into a coherent concept of up and down. Since there are no cues from gravity in space, astronauts have to adjust the way they determine up from down, with the possible risk of space motion sickness. In three tasks performed by one astronaut...
article 2006
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Beintema, J.A. (author), Georg, K. (author), Lappe, M. (author)
The visual perception of human movement from sparse point-light walkers is often believed to rely on local motion analysis. We investigated the role of local motion in the perception of human walking, viewed from the side, in different tasks. The motion signal was manipulated by varying point lifetime. We found the task of coherence...
article 2006
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McKee, R.H. (author), Lammers, J.H.C.M. (author), Hoogendijk, E.M.G. (author), Emmen, H.H. (author), Muijser, H. (author), Barsotti, D.A. (author), Owen, D.E. (author), Kulig, B.M. (author), TNO Kwaliteit van Leven (author)
As a preliminary step to evaluating the acute neurobehavioral effects of hydrocarbon solvents and to establish a working model for extrapolating animal test data to humans, joint neurobehavioral/toxicokinetic studies were conducted which involved administering ethanol to rats and volunteers. The specific objectives of the present studies were to...
article 2006
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van Erp, J.B.F. (author), Werkhoven, P.J. (author), TNO Technische Menskunde (author)
article 2004
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Vreugdenhil, H.J.I. (author), Emmen, H.H. (author), Mulder, P.G.H. (author), Weisglas-Kuperus, N. (author), TNO Voeding (author)
PCBs are known for their neurotoxic properties, especially on the developing brain. To increase insight into the neurotoxic effects of PCB exposure, the authors studied the effects of perinatal exposure to environmental levels of these compounds on different neuropsychological domains. In 9-year-old children of the Rotterdam PCB-dioxin cohort,...
article 2004
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Bos, J.E. (author), Bles, W. (author), TNO Technische Menskunde (author)
Motion sickness is not only elicited by certain kinds of self-motion, but also by motion of a visual scene. In case of the latter, optokinetic drums are often used and a visual-vestibular conflict is assumed to cause the sickness. When the rotation axis is Earth vertical however, different studies show different results. Here, we propose that...
article 2004
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Hogervorst, M.A. (author), Brenner, E. (author), TNO Technische Menskunde (author)
A common assumption in cue combination models is that small discrepancies between cues are due to the limited resolution of the individual cues. Whenever this assumption holds, information from the separate cues can best be combined to give a single, more accurate estimate of the property of interest. We examined whether information about the...
article 2004
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van Asperen, J. (author), Rijcken, W.R.P. (author), Lammers, J.H.C.M. (author), TNO Voeding (author)
The toxicity of inhalatory exposure to organic solvents may not only be related to the total external dose, but also to the pattern of exposure. In this study physiologically based toxicokinetic (PBTK) modelling has been used to study the impact of the exposure scenario on the toxicokinetics and the behavioural effects of the model solvent...
article 2003
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Groen, E.L. (author), Jenkin, H.L. (author), Howard, I.P. (author)
A tilted furnished room can induce strong visual reorientation illusions in stationary subjects. Supine subjects may perceive themselves upright when the room is tilted 90¦ so that the visual polarity axis is kept aligned with the subject. This -upright illusion' was used to induce roll tilt in a truly horizontal, but perceptually vertical,...
article 2002
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van Winsum, W. (author)
18 Subjects were tested in a simulator to assess whether choice of time headway in car-following is related to individual differences in perceptual-motor skills. Drivers with a larger preferred time headway committed larger steering errors while driving on a winding road and were less accurate in maintaining a constant distance to a lead vehicle...
article 1999
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Bles, W. (author), TNO Technische Menskunde (author)
Coriolis effects are notorious in relation to disorientation and motion sickness in aircrew. A review is provided of experimental data on these Coriolis effects, including the modulatory effects of adding visual or somatosensory rotatory motion information. A vector analysis of the consequences of head movements during somatosensory, visual and...
article 1998
Searched for: subject:"Perception"
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