title: Asymmetry in a verbal-manual task combination: habitual vs controlled verbal production.
abstract: Interference between verbal production and left- and right-hand tapping was studied in male right-handed subjects in two experiments. The hypothesis was studied that controlled rather than automatic verbal production causes the interference with right-hand performance. Experiment 1 compared the repeated production of one verbal number response with the production of a random sequence of numbers. Experiment 2 studied one additional condition: counting from one to 20. The results showed that repetition and counting do not selectively interfere with right-hand tapping, while the randomization of numbers does. These results support the controlled-processing hypothesis of interference with right-hand performance.
authors.affiliation: University of Utrecht, The Netherlands.
authors.forename: S
authors.initials: S
authors.lastname: Wiegersma
authors.forename: R
authors.initials: R
authors.lastname: Wijnmaalen
mesh_terms: D000328:Adult; D001288:Attention; D004292:Dominance, Cerebral; D007839:Functional Laterality; D006801:Humans; D011939:Mental Recall; D009048:Motor Skills; D014705:Verbal Behavior