Searched for: subject%3A%22Perception%22
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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
Werkhoven, P.J. (author), van Veen, H.A.H.C. (author), TNO Technische Menskunde (author)
We quantified the ability of human subjects to discriminate the relative distance of two points from a slanted plane when viewing the projected velocities of this scene (orthographic projection). The relative distance from a plane (called relief) is a 3-D property that is invariant under linear (affine) transformations. As such, relief can in...
article 1995
document
Bles, W. (author), Jelmorini, M. (author), Bekkering, H. (author), de Graaf, B. (author), TNO Technische Menskunde (author)
A sensation of linear self-motion can be induced in a blindfolded stationary sitting subject, who keeps contact with a linearly moving platform (acceleration 0.1 m/s²) in the frontoparallel plane by means of a hand-over-hand walking action. When discordant suprathreshold vestibular information from the otoliths is added by moving the subject...
article 1995
document
Heus, R. (author), Daanen, H.A.M. (author), Havenith, G. (author), TNO Technische Menskunde (author)
Hands are important instruments in daily life. Without hands man is hardly able to function independently. Proper functioning of the hands is determined by several physiological parameters. These physiological parameters in turn are influenced by environmental factors. In this view of the literature, physiological processes in manual dexterity...
article 1995
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van den Berg, L.G. (author), Steeneken, H.J.M. (author), van Leeuwen, D.A. (author), TNO Technische Menskunde (author)
In een luisterexperiment zijn de prestaties vergeleken van automatische spraakherkennigssystemen (ash) en luisteraars. Luisteraars scoorden (uiteraard) beter, maar lieten zich meer beinvloeden door zinslengte ASH-systemen meer door perplexiteit.
report 1995
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TNO Technische Menskunde (author), Kappé, B. (author), Korteling, J.E. (author)
The Royal Netherlands Army has an increasing need for advice concerning the visual information needed by a driver in a driving simulator in order to perform perceptual-motor parts of the driving task. This knowledge can be used to formulate the CGI-requirements in such a way that the cost-benefit ratio can be improved. In this connection the...
report 1995
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TNO Human Factors Research Institute (author), Kappé, B. (author), Korteling, J.E. (author)
When driving a car it is of vital importance that the driver is able to time his actions accurately. Estimating when objects will be reached (the time to contact or TTC) is fundamental to many driving tasks. Visual information is the drivers primary source of TTC information. The present study investigated the way this information should be...
report 1995
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Walraven, J. (author), Janzen, P. (author)
In this investigation, carried out under a Youth Health Care postgraduate course in Nijmegen, the stereopsis of a school population of 730 children, aged 4-18 years, was recorded and clinically evaluated. Stereopsis was measured using the TNO test, a random-dot stereo test especially designed for the early detection of amblyopia. The main aims...
article 1993
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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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Bollen, E. (author), den Heijer, J.C. (author), Tolsma, M.H.J. (author), Bellari, S. (author), Bos, J.E. (author), Wintzen, A.R. (author), TNO Technische Menskunde (author)
Smooth pursuit eye movements were studied with infrared reflection equipment in 10 patients with myotonic dystrophy and in 10 age- and sex-matched controls. Smooth pursuit gain, measured after correction for catch-up saccades, was decreased in the patient group Normal latencies of saccadic eye movements made a lack of attention an unlikely...
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
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Korteling, J.E. (author)
Age-related differences in dual-task performance may be affected by factors such as skill integration and perceptual competition. Therefore these factors were examined in a dual-task experiment with young and older adults involving two one-dimensional compensatory tracking tasks. Single-task difficulty was individually adjusted for each subject....
article 1991
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Walraven, J. (author), Werner, J.S. (author)
The locus of unique white was measured for two observers over a wide range of stimulus intensities, using both direct matching and absolute judgements. Chromaticity coordinates of each observer's unique white were found to be invariant over a range of about 4 log units. This result is discussed in the context of the class of models that explain...
article 1991
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Vos, J.J. (author), Estevez, O. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
New action spectra are derived for the foveal cones on the basis of three assumptions: (1) the Stiles-Burch (1959) colorimetric data are better than CIE 1931; (2) the long wavelength flanks of the dichromatic luminosity functions offer better anchorage than the confusion loci; and (3) the relative mutual heights per receptor can be derived from...
article 1990
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Wertheim, A.H. (author), van Gelder, P. (author)
When the eyes pursue a fixation point that sweeps across a moving background pattern, and the fixation point is suddenly made to stop, the ongoing motion of the background pattern seems to accelerate to a higher velocity. Experiment I showed that this acceleration illusion is not caused by the sudden change in (i) the relative velocity between...
article 1990
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Instituut voor Zintuigfysiologie TNO (author), Godthelp, J. (author), Tenkink, E. (author)
Literatuurstudie naar de terminologie en criteria, welke worden gehanteerd bij het beoordelen van zichtafstanden op wegen. Geconcludeerd wordt dat de bestaande terminologie verwarrend is. Daarom wordt aanbevolen voor het aanwezige, meetbare zicht steeds de term "zichtafstand" te gebruiken. Voor de aan de zichtafstand te stellen eis wordt de term...
report 1990
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TNO Technische Menskunde (author), de Graaf, B. (author)
Visuologie - oogbewegingen, bewegen, zien, zoekenVisuologie - oogbewegingen, bewegen, zien, zoeken.
doctoral thesis 1990
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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
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Toet, A. (author), Instituut voor Zintuigfysiologie TNO (author)
This paper introduces a hierarchial image merging scheme based on a multiresolution contrast decomposition (the ratio of low-pass pyramid). The composite images produced by this scheme preserve those details from the input images that are most relevant to visual perception. Some applications of the method are indicated
article 1989
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Instituut voor Zintuigfysiologie TNO (author), Riemersma, J.B.J. (author)
Onderzocht wordt zowel de objectieve veiligheid als de beleving door de weggebruiker van buiten de bebouwde kom gelegen dubbelbaans autowegen met gelijkvloerse kruisingen. Centraal staat de vraag in hoeverre weggebruikers in staat zijn verschillende categorieën wegen te onderscheiden en op grond van werke kenmerken zij tot dit onderscheid komen....
report 1988
Searched for: subject%3A%22Perception%22
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