Response force as a measure of stimuli context impact on simple reaction time

Mean reaction time is slower when stimuli are presented randomly in mixed blocks, than when they are presented in pure blocks. It is possible to explain such contextual effects by Grices model of variable criterion variation, or by Adaptation-Level Theory proposed by Helson. However, both of the mod...

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Matična publikacija: 6th Alps-Adria Conference of Psychology
Jastrebarsko : "Naklada Slap", 2002
Glavni autor: Ivanec, Dragutin (-)
Vrsta građe: Članak
Jezik: eng
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245 1 0 |a Response force as a measure of stimuli context impact on simple reaction time /  |c Ivanec, Dragutin. 
246 3 |i Naslov na engleskom:  |a Response force as a measure of stimuli context impact on simple reaction time 
300 |a 93  |f str. 
520 |a Mean reaction time is slower when stimuli are presented randomly in mixed blocks, than when they are presented in pure blocks. It is possible to explain such contextual effects by Grices model of variable criterion variation, or by Adaptation-Level Theory proposed by Helson. However, both of the models are insufficient in explaining all outcomes in sensori-motor procesess conected with type of stimuli presentation. The aim of the study was to offer additional proof for the nature of stimuli context impact on simple reaction time. We, therefore, used reaction force as an additional measure of different processes in two contextual situation. Reaction force is closely connected with intensity of stimulus - stronger stimuli produce stronger reaction force. Otherwise, reaction time and reaction force were not associated when every single reaction was observed. According to this findings, reaction force can be very useful variable in studing processes connected with contextual impact on simple reaction time. The study was conducted on 18 subjects. All subjects were exposed to both experimental conditions ; condition with stimuli presented in mixed blocks and condition with same stimulus intensity in sequence (pure blocks). The reaction time and response force were measured. As expected, the results showed for mean reaction time to depend on stimuli context. In mixed blocks condition the reaction time was found to be longer. The reaction force was not associated with the stimuli context and was found to be the same in both experimental conditions. According to this relation of context stimuli, reaction time and reaction force, context stimuli influences reaction time, neither through perceptive, nor motor processes. Cognitive, central processes seem to play major role. 
536 |a Projekt MZOS  |f 0130475 
546 |a ENG 
690 |a 5.06 
693 |a stimuli context, random blocks, mixed blocks, reaction time, reaction force  |l hrv  |2 crosbi 
693 |a stimuli context, random blocks, mixed blocks, reaction time, reaction force  |l eng  |2 crosbi 
773 0 |a 6th Alps-Adria Conference of Psychology (03.-05.10.2002. ; Rovereto ; Italija)  |t 6th Alps-Adria Conference of Psychology  |d Jastrebarsko : "Naklada Slap", 2002  |n Kolesarić, Vladimir ; Krizmanić, Mirjana ; Ivanec, Dragutin  |g str. 93 
942 |c RZB  |u 1  |v Nista  |z Znanstveni - Poster - Sazetak 
999 |c 314119  |d 314117