Searched for: subject%3A%22Perception%22
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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
Dai, H. (author), Versfeld, N.J. (author), Green, D.M. (author), TNO Technische Menskunde (author)
In this paper we derive the optimum (likelihood-ratio) decision statistic for a same-different paradigm. The likelihood ratio is dependent on the degree of correlation between the two observations on each trial. For the two extreme cases in which the observations are either independent or highly correlated, the optimum decision rule is identical...
article 1996
document
Nijssen, B. (author), Kamperman, T. (author), Jetten, J. (author), TNO Voeding (author)
The use of PET bottles for packaging soft drinks and mineral waters is still growing world wide. The production process for these bottles is improving constantly. These improvements are focussed on bottles with better barrier properties, higher inertness and higher heat stability. One of the factors determining the quality of PET bottles is the...
article 1996
document
Bos, J.E. (author), de Graaf, B. (author), TNO Technische Menskunde (author)
article 1996
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van Veen, H.A.H.C. (author), Werkhoven, P. (author), TNO Technische Menskunde (author)
As a three-dimensional object is moving through our world, we generally obtain a vivid impression of both its structure and its motion through space. The time-course of two-dimensional projections of the scene (optic flow) is important in conveying this three-dimensional information to us. The extent to which we can solve this specific inverse...
article 1996
document
TNO Technische Menskunde (author)
conference paper 1996
document
Essens, P.J.M.D. (author), TNO Technische Menskunde (author)
article 1996
document
Bos, J.E. (author), de Graaf, B. (author), Bles, W. (author), Wertheim, A.H. (author), TNO Technische Menskunde (author)
article 1996
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TNO Technische Menskunde (author), Post, W.M. (author), Koster, W. (author), Šrámek, M. (author), Schreiber, G. (author), Zocca, V. (author), de Vries, B. (author)
This article describes a system for the optimization of the prehospital assessment of emergency, in cases involving thoraco-abdominal complaints and consciousness problems. This assessment is performed by nurses on the basis of a telephone interview at ambulance dispatch centers. The system has a body of biomedical and policy knowledge available...
article 1996
document
Versfeld, N.J. (author), Dai, H. (author), Green, D.M. (author), TNO Technische Menskunde (author)
This paper presents the optimum decision rule for an m-interval oddity task in which m-1 intervals contain the same signal and one is different or odd. The optimum decision rule depends on the degree of correlation among observations. The present approach unifies the different strategies that occur with "roved" or "fixed" experiments (Macmillan ...
article 1996
document
de Graaf, B. (author), Bos, J.E. (author), Groen, E. (author), TNO Technische Menskunde (author)
In reply to a commentary of Dr. D.M. Merfeld on the paper "Saccular impact on Ocular Torsion", a plea is given for letting subjects themselves decide what the favour-able head position is during motion stimulation. This is preferable to an orientation imposed by the investigator, based on anatomical facts.
article 1996
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Groen, E. (author), de Graaf, B. (author), Bles, W. (author), Bos, J.E. (author), TNO Technische Menskunde (author)
To assess a possible otolith contribution to effects observed following prolonged expo-sure to hyper gravity, we used video-oculography to measure ocular torsion during static and dynamic conditions of lateral body tilt (roll) before and after one hour of centrifugation with a Gx-load of 3G. Static tilt (from 0 to 57 deg. to either side) showed...
article 1996
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Kooi, F.L. (author), TNO Technische Menskunde (author)
When regions containing a counterphasing sine-wave grating are presented side by side and in spatial and temporal quadrature phase, a transparent perception of motion results. This occurs even though none of the stimulus parts is moving. The two percepts of motion in these displays are in opposite directions, one analogous to brightness contrast...
article 1995
document
Wertheim, A.H. (author), TNO Technische Menskunde (author)
This is a popularly written expose of what the profession of experimental psychol-ogy comprises. It is based on personal experience and is intended for a general readership of PhD students.
article 1995
document
de Graaf, B. (author), Bles, W. (author), Bos, J.E. (author), Groen, E. (author), TNO Technische Menskunde (author)
A hypothesis about the position of the eyes under weightlessness could be verified during parabolic flight. The eyes, namely, tort a few degrees inwards (cyclo-versional behaviour) during zero-G. The data suggest that the saccular otoliths contribute to ocular torsion.
conference paper 1995
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Luscuere, P.G. (author), TNO Bouw, Binnenmilieu, bouwfysica en installaties (author)
conference paper 1995
document
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
document
Essens, P.J.M.D. (author), TNO Technische Menskunde (author)
Rhythms differ in how well they can be remembered and reproduced. The cen-tral thesis of this dissertation is that people use a mental time scale to structure rhythms. A mental time scale can be thought of as a sequence of beats separated by equal time intervals. It is used to break a rhythm down into smaller parts which can be coded further. In...
doctoral thesis 1995
document
de Vries, S.C. (author), Werkhoven, P. (author), TNO Technische Menskunde (author)
In many laboratory setups and in many day-to-day situations, a unique solution of the structure-from-two-views problem is unobtainable. Yet, when the visual system is presented with two projections in a sequence, it nevertheless appears to generate a reasonably stable percept of structure. In the research reported here, we examined whether the...
article 1995
document
Essens, P.J.M.D. (author), TNO Technische Menskunde (author)
Two stages for structuring tone sequences have been distinguished by Povel and Essens (1985). In the first, a mental clock segments a sequence into equal time units (clock model); in the second, intervals are specified in terms of subdivisions of these units. The present findings support the clock model in that it predicts human performance...
article 1995
Searched for: subject%3A%22Perception%22
(361 - 380 of 426)

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