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Généralisation du stimulus
The tendency to react to stimuli that are different from, but somewhat similar to, the stimulus used as a conditioned stimulus.
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- voir aussi au terme générique : [Descripteurs (mots clés)] Généralisation (psychologie)
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Stimulus unpredictability in time, magnitude, and direction on accommodation / Carles Otero in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
[article]
in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019)
Titre : Stimulus unpredictability in time, magnitude, and direction on accommodation Type de document : article de périodique Auteurs : Carles Otero ; Mikel Aldaba ; Fernando DÃaz-Doutón ; Fuensanta Vera-Diaz ; Jaume Pujol Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Généralisation du stimulus
[Thésaurus Mesh]StatistiquesRésumé : SIGNIFICANCE The effect of predictability in changes of time, magnitude, and direction of the accommodation demand on the accommodation response latency and its magnitude are insignificant, which suggests that repetitive accommodative tasks such as the clinical accommodative facility test may not be influenced by potential anticipation effects.
PURPOSE The purpose of this study was to investigate the effect of stimulus' time, magnitude, and direction predictability, as well as their interactions, on accommodation latency and response magnitude.
METHODS Monocular accommodative response and latency were measured in 12 young subjects for nine different conditions where the stimulus accommodative demand changed several times in a steplike fashion for a period of 120 seconds. Each change in accommodative demand could have different time duration (i.e., 1, 2, or 3 seconds), magnitude (1, 2, or 3 diopters), and/or direction (i.e., accommodation or disaccommodation). All conditions were created permuting the factors of time, magnitude, and direction with two levels each: random and not random. The baseline condition was a step signal from 0 to 2 diopters persisting for 2 seconds in both accommodative demands. After each condition, subjects were asked to provide a score from 1 to 5 in their perceived predictability.
RESULTS Friedman test conducted on the perceived predictability of each condition resulted in statistically significant differences between the nine conditions (χ2 = 56.57, P < .01). However, repeated-measures analysis of variance applied to latency and accommodative response magnitude did not show significant differences (P > .05). In addition, no correlation was found between the perceived predictability scores and both latency and accommodative response magnitudes between the most predictable and the most unpredictable conditions.
CONCLUSIONS Subjects were able to perceptually notice whether the stimulus was predictable or not, although our results indicate no significant effect of stimuli predictability on either the accommodation latency or its magnitude.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
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