Generalization of induced interhemispheric interference: a chronometric approach to one-brain vs two-brains models of the hemispheres' cooperation.
A reaction time study with normal human subjects was conducted to obtain support for one or the other model of interhemispheric relations--referred to as the "one-system" and the "two-systems" hypotheses. 12 subjects were extensively trained in a complex reaction time task consisting of a "priming sub-task" which introduced interhemispheric interference and two different "test sub-tasks" measuring the generalization of interference. The interference priming produced visible slowing of RT's on subsequent trials. Interestingly, the deterioration of the two test sub-tasks was alike, despite the marked difference in the amount of the interhemispheric communication they required. This result is more in line with the one-system hypothesis, as the two-systems hypothesis predicts deterioration proportional to the amount of the required interhemispheric communication.
Wolski
P
P
Institute of Psychology, Jagiellonian University, Kraków, Poland.
D000328:Adult; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D005793:Generalization, Psychological / Q000502:physiology*; D006801:Humans; D008297:Male; D008959:Models, Neurological; D013997:Time Factors