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Stimulus-dependent modulation of perceptual and motor learning in a serial reaction time task.

Kirsch W, Hoffmann J - Adv Cogn Psychol (2012)

Bottom Line: Two sequences were used, in which structural regularities occurred either in the horizontal or in the vertical locations of successive stimuli.This pattern of results was independent of whether three fingers (Experiment 1) were used or only one finger (Experiment 2) was used for responding.This result suggests that perceptual and motor learning mechanisms may be weighted differently depending on the context in which the stimulus is presented.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, University of Würzburg, Germany.

ABSTRACT
In two experiments, we investigated the impact of spatial attributes on the representation acquired during a serial reaction time task. Two sequences were used, in which structural regularities occurred either in the horizontal or in the vertical locations of successive stimuli. After training with the dominant hand, participants were required to respond with the non-dominant hand to either the original sequence or to a mirror-ordered version of the original sequence that required finger movements homologous to those used during training. We observed that a difference in reaction times between the two transfer conditions was smaller in the vertical sequence than in the horizontal sequence. This pattern of results was independent of whether three fingers (Experiment 1) were used or only one finger (Experiment 2) was used for responding. This result suggests that perceptual and motor learning mechanisms may be weighted differently depending on the context in which the stimulus is presented.

No MeSH data available.


Sequences of stimuli used in Experiment 1. Alphabetic characters indicatelocations with respect to the horizontal and vertical dimensions: r =right, l = left, m = middle, a = above, b = below. The sequences arearranged from left to right and from top to bottom (i.e., the firstelement is top-left, the ninth is bottom-right).
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Figure 2: Sequences of stimuli used in Experiment 1. Alphabetic characters indicatelocations with respect to the horizontal and vertical dimensions: r =right, l = left, m = middle, a = above, b = below. The sequences arearranged from left to right and from top to bottom (i.e., the firstelement is top-left, the ninth is bottom-right).

Mentions: RTs from error trials (3.55 %) were excluded from the analysis. Moreover,responses that were more than three standard deviations above the mean RT, asdetermined separately for each participant and each block, were consideredoutliers and discarded from further analyses (1.93 % of responses). In theremaining trials, we computed median RTs for each subject and block of trials.The mean median RTs for each sequence and block are shown in Figure 2.


Stimulus-dependent modulation of perceptual and motor learning in a serial reaction time task.

Kirsch W, Hoffmann J - Adv Cogn Psychol (2012)

Sequences of stimuli used in Experiment 1. Alphabetic characters indicatelocations with respect to the horizontal and vertical dimensions: r =right, l = left, m = middle, a = above, b = below. The sequences arearranged from left to right and from top to bottom (i.e., the firstelement is top-left, the ninth is bottom-right).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376890&req=5

Figure 2: Sequences of stimuli used in Experiment 1. Alphabetic characters indicatelocations with respect to the horizontal and vertical dimensions: r =right, l = left, m = middle, a = above, b = below. The sequences arearranged from left to right and from top to bottom (i.e., the firstelement is top-left, the ninth is bottom-right).
Mentions: RTs from error trials (3.55 %) were excluded from the analysis. Moreover,responses that were more than three standard deviations above the mean RT, asdetermined separately for each participant and each block, were consideredoutliers and discarded from further analyses (1.93 % of responses). In theremaining trials, we computed median RTs for each subject and block of trials.The mean median RTs for each sequence and block are shown in Figure 2.

Bottom Line: Two sequences were used, in which structural regularities occurred either in the horizontal or in the vertical locations of successive stimuli.This pattern of results was independent of whether three fingers (Experiment 1) were used or only one finger (Experiment 2) was used for responding.This result suggests that perceptual and motor learning mechanisms may be weighted differently depending on the context in which the stimulus is presented.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, University of Würzburg, Germany.

ABSTRACT
In two experiments, we investigated the impact of spatial attributes on the representation acquired during a serial reaction time task. Two sequences were used, in which structural regularities occurred either in the horizontal or in the vertical locations of successive stimuli. After training with the dominant hand, participants were required to respond with the non-dominant hand to either the original sequence or to a mirror-ordered version of the original sequence that required finger movements homologous to those used during training. We observed that a difference in reaction times between the two transfer conditions was smaller in the vertical sequence than in the horizontal sequence. This pattern of results was independent of whether three fingers (Experiment 1) were used or only one finger (Experiment 2) was used for responding. This result suggests that perceptual and motor learning mechanisms may be weighted differently depending on the context in which the stimulus is presented.

No MeSH data available.