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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.


S equences of stimuli used in Experiment 1. Alphabetic charactersindicate locations with respect to the horizontal and verticaldimensions: r = right, l = left, m = middle, a = above, b = below.The sequences are arranged from left to right and from top to bottom(i.e., the first element is top-left, the ninth isbottom-right).
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Figure 1: S equences of stimuli used in Experiment 1. Alphabetic charactersindicate locations with respect to the horizontal and verticaldimensions: r = right, l = left, m = middle, a = above, b = below.The sequences are arranged from left to right and from top to bottom(i.e., the first element is top-left, the ninth isbottom-right).

Mentions: Participants performed an SRT task. The visual stimuli consisted of nine greycircles arranged in a 3 × 3 array presented on a white background inthe center of a 17-inch monitor. The viewing distance was approximately 50cm. The circles were ~41 mm in diameter and were separated by ~60 mm (i.e.,from center to center). In each trial, one of the nine circles was shaded toindicate the current stimulus location, and participants had to respond asquickly and accurately as possible to this stimulus (see Figure 1). Participants used thenumerical keypad of a standard QWERTY keyboard to respond. The circlelocations were compatibly assigned to the keys (i.e., the upper row ofcircles corresponded to the keys [7], [8], and [9], the middle row ofcircles corresponded to the keys [4], [5], and [6], and the lower row ofcircles corresponded to the keys [1], [2], and [3]). Participants wereinstructed to use their index, middle, and ring fingers when responding. Themiddle finger was aligned to the middle column, and the index and ringfingers were assigned to the outer columns. For instance, when the righthand was used, a participant responded to the circles appearing on the leftside of the stimulus display by pressing the keys [1], [4], or [7] withtheir index finger, depending on the exact location of the stimulus.


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

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

S equences of stimuli used in Experiment 1. Alphabetic charactersindicate locations with respect to the horizontal and verticaldimensions: r = right, l = left, m = middle, a = above, b = below.The sequences are arranged from left to right and from top to bottom(i.e., the first element is top-left, the ninth isbottom-right).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 1: S equences of stimuli used in Experiment 1. Alphabetic charactersindicate locations with respect to the horizontal and verticaldimensions: r = right, l = left, m = middle, a = above, b = below.The sequences are arranged from left to right and from top to bottom(i.e., the first element is top-left, the ninth isbottom-right).
Mentions: Participants performed an SRT task. The visual stimuli consisted of nine greycircles arranged in a 3 × 3 array presented on a white background inthe center of a 17-inch monitor. The viewing distance was approximately 50cm. The circles were ~41 mm in diameter and were separated by ~60 mm (i.e.,from center to center). In each trial, one of the nine circles was shaded toindicate the current stimulus location, and participants had to respond asquickly and accurately as possible to this stimulus (see Figure 1). Participants used thenumerical keypad of a standard QWERTY keyboard to respond. The circlelocations were compatibly assigned to the keys (i.e., the upper row ofcircles corresponded to the keys [7], [8], and [9], the middle row ofcircles corresponded to the keys [4], [5], and [6], and the lower row ofcircles corresponded to the keys [1], [2], and [3]). Participants wereinstructed to use their index, middle, and ring fingers when responding. Themiddle finger was aligned to the middle column, and the index and ringfingers were assigned to the outer columns. For instance, when the righthand was used, a participant responded to the circles appearing on the leftside of the stimulus display by pressing the keys [1], [4], or [7] withtheir index finger, depending on the exact location of the stimulus.

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.