Searched for: subject:"Perception"
(401 - 420 of 421)

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document
Wolthuis, O.L. (author), Medisch Biologisch Laboratorium TNO (author)
The effects of etiracetam, a structural analogue or piracetam, were investigated in rats on Y-maze discrimination acquisition, on open field behavior, on one-trial passive avoidance learning and on shuttlebox acquisition and extinction. The results indicate that this drug significantly enhances acquisition and may improve retention without...
article 1981
document
TNO Technische Menskunde (author)
book 1981
document
Noble, M.E. (author), Sanders, A.F. (author), Instituut voor Zintuigfysiologie TNO (author)
An experiment is described in which subjects were required to search for familiar traffic signals. Half the time this was done while also engaged in a manual compensatory tracking task. The experimental variables of the visual search task were color, total number of signals exposed, the number of relevant signals, and the density of the signals....
article 1980
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Walraven, J. (author), Instituut voor Zintuigfysiologie TNO (author)
article 1979
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Valeton, J.M. (author), van Norren, D. (author), Instituut voor Zintuigfysiologie TNO (author)
A blue stimulus that is just visible in the presence of a yellow adapting field remains invisible for several seconds after the yellow field has been turned off. This 'transient tritanopia' is shown to exist already at the level of the b-wave of the electroretinogram. The experiments were done on rhesus monkeys and the results were qualitatively...
article 1979
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Perdok, J. (author), Gaillard, A.W.K. (author), Instituut voor Zintuigfysiologie TNO (author)
Slow EEG potentials were recorded during the foreperiod of a signal detection task which involved different levels of discrimination difficulty. The subject was requried to react to S2 as quickly as possible or to delay his responses by 1 s. It was found that the contingent negative variation (CNV) was attenuated when no speeded response was...
article 1979
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Gaillard, A.W.K. (author), Perdok, J. (author), Instituut voor Zintuigfysiologie TNO (author)
Slow EEG potentials (Fz, Cz, Pz) and heart rate were recorded during the foreperiod of a reaction task, which involved different levels of discrimination difficulty. A simple reaction task was compared with a selective reaction task where either an easy or a difficult discrimination was required. In general, the terminal amplitude of the CNV was...
article 1979
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Bunt, A.A. (author)
Thirty-two subjects had tests of serial recall of visually presented nine-digit lists which were either presented in a single block of trials (constant context) or in between lists of much longer length (variable context). Other variables were vocalization-during-presentation versus silent memorization (within subject) and order of recall ...
article 1976
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Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
On the basis of new experimental data of tritanopic vision the convergence centre for tritanopia has been redetermined, and has turned out to bex' = 0.1747,y' = 0.0060 in the Judd 1951-chromaticity diagram. A consequence of this determination is that the blue system is more sensitive than was concluded from the Thomson-Wright (1953) study. The...
article 1974
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Instituut voor zintuigfysiologie TNO (author), RVO IZF (author)
book 1974
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Näätänen, R. (author), Instituut voor Zintuigfysiologie TNO (author)
conference paper 1972
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Vos, J.J. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
On the basis of the concepts, discussed in Part I of this study, a line element is developed to describe colour discrimination data. First the simple case of unsaturated neural data transmission is treated. Then complicating effects of saturation and supersaturation are introduced. The goodness of fit with shapes and orientation of JND-ellipses...
article 1972
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Bouman, M.A. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
On the basis of measurements of the achromatic zone for red light in the fovea and for green light in the periphery, a discussion is given on the possible difference in threshold mechanisms for the achromatic (scotopic) and chromatic (photopic) retinal systems. A specific suggestion for this distinction is given that not directly refers to the...
article 1972
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Bunt, A.A. (author), Sanders, A.F. (author)
An experiment is reported on the effects of cognitive similarity on proactive and retroactive interference (PI, RI) in short term memory. To avoid confounding between cognitive and acoustic similarity, the materials - i.e. words and digits - were matched with respect to vowel pattern. Effects of both PI and RI were found on recall of words,...
article 1972
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Vos, J.J. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
To derive the fundamental response curves for the three colour mediating systems from the location of the dichromatic confusion centres, one must make certain assumptions on the nature of dichromatism. It is shown, however, that one can avoid to make specific quantitative assumptions by bringing into the picture other visual data, such as the...
article 1971
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Michon, J.A. (author), Instituut voor Zintuigfysiologie TNO (author)
doctoral thesis 1967
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van den Brink, G. (author), Instituut voor Zintuigfysiologie TNO (author)
Studies on the threshold perception - first in the field of vision, later also in the field of hearing - have been a substantial part of the Institute's research programme from the beginning. Since only a few investigators had experience in both fields, an attempt to compare methods and results has never been made. The present author, one of...
bookPart 1966
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Instituut voor Zintuigfysiologie TNO (author)
book 1966
document
book 1962
document
Kruger, A.J. (author), Afdeling Gezondheidstechniek TNO (author)
article 1956
Searched for: subject:"Perception"
(401 - 420 of 421)

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