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Benefits of stimulus congruency for multisensory facilitation of visual learning.

Kim RS, Seitz AR, Shams L - PLoS ONE (2008)

Bottom Line: However, multisensory interactions are ubiquitous in perception, even at early processing stages, and thus can potentially play a role in learning.Here, we examine the effect of auditory-visual congruency on visual learning.Subjects were trained over five days on a visual motion coherence detection task with either congruent audiovisual, or incongruent audiovisual stimuli.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, University of California Los Angeles, Los Angeles, California, USA.

ABSTRACT

Background: Studies of perceptual learning have largely focused on unisensory stimuli. However, multisensory interactions are ubiquitous in perception, even at early processing stages, and thus can potentially play a role in learning. Here, we examine the effect of auditory-visual congruency on visual learning.

Methodology/principle findings: Subjects were trained over five days on a visual motion coherence detection task with either congruent audiovisual, or incongruent audiovisual stimuli. Comparing performance on visual-only trials, we find that training with congruent audiovisual stimuli produces significantly better learning than training with incongruent audiovisual stimuli or with only visual stimuli.

Conclusions/significance: This advantage from stimulus congruency during training suggests that the benefits of multisensory training may result from audiovisual interactions at a perceptual rather than cognitive level.

Show MeSH
Difference in learning effect (i.e. increase in percent correct from pre- to post-test) between trained and untrained directions, for congruent, visual, and incongruent training groups.Error bars reflect standard error.
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pone-0001532-g003: Difference in learning effect (i.e. increase in percent correct from pre- to post-test) between trained and untrained directions, for congruent, visual, and incongruent training groups.Error bars reflect standard error.

Mentions: Tests of multiple motion directions, including the trained direction and three untrained directions, were conducted before and after training to examine the specificity of learning. We compared the change in performance from pre- to post-test for the trained direction with the average change for the three untrained directions. If indeed the learning reflects perceptual learning rather than (or in addition to) general task learning, the improvement should not be equal between trained and untrained directions. Figure 3 shows the difference in learning effect (i.e. increase in percent correct from pre- to post-test) between the trained and untrained directions for the audiovisual congruent, visual, and audiovisual incongruent trained groups, respectively. Similarly to performance during training, the congruent audiovisual trained group demonstrates a greater learning effect for the trained compared to untrained directions than the other two groups. The advantage for the trained direction after training is significant for the congruent group and the incongruent group (p<0.05, paired t-test), suggesting that the observed improvement in performance indeed reflects low-level perceptual learning. However, the unisensory group only showed a trend for greater improvement for the trained direction than untrained directions (pā€Š=ā€Š0.12).


Benefits of stimulus congruency for multisensory facilitation of visual learning.

Kim RS, Seitz AR, Shams L - PLoS ONE (2008)

Difference in learning effect (i.e. increase in percent correct from pre- to post-test) between trained and untrained directions, for congruent, visual, and incongruent training groups.Error bars reflect standard error.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2211398&req=5

pone-0001532-g003: Difference in learning effect (i.e. increase in percent correct from pre- to post-test) between trained and untrained directions, for congruent, visual, and incongruent training groups.Error bars reflect standard error.
Mentions: Tests of multiple motion directions, including the trained direction and three untrained directions, were conducted before and after training to examine the specificity of learning. We compared the change in performance from pre- to post-test for the trained direction with the average change for the three untrained directions. If indeed the learning reflects perceptual learning rather than (or in addition to) general task learning, the improvement should not be equal between trained and untrained directions. Figure 3 shows the difference in learning effect (i.e. increase in percent correct from pre- to post-test) between the trained and untrained directions for the audiovisual congruent, visual, and audiovisual incongruent trained groups, respectively. Similarly to performance during training, the congruent audiovisual trained group demonstrates a greater learning effect for the trained compared to untrained directions than the other two groups. The advantage for the trained direction after training is significant for the congruent group and the incongruent group (p<0.05, paired t-test), suggesting that the observed improvement in performance indeed reflects low-level perceptual learning. However, the unisensory group only showed a trend for greater improvement for the trained direction than untrained directions (pā€Š=ā€Š0.12).

Bottom Line: However, multisensory interactions are ubiquitous in perception, even at early processing stages, and thus can potentially play a role in learning.Here, we examine the effect of auditory-visual congruency on visual learning.Subjects were trained over five days on a visual motion coherence detection task with either congruent audiovisual, or incongruent audiovisual stimuli.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, University of California Los Angeles, Los Angeles, California, USA.

ABSTRACT

Background: Studies of perceptual learning have largely focused on unisensory stimuli. However, multisensory interactions are ubiquitous in perception, even at early processing stages, and thus can potentially play a role in learning. Here, we examine the effect of auditory-visual congruency on visual learning.

Methodology/principle findings: Subjects were trained over five days on a visual motion coherence detection task with either congruent audiovisual, or incongruent audiovisual stimuli. Comparing performance on visual-only trials, we find that training with congruent audiovisual stimuli produces significantly better learning than training with incongruent audiovisual stimuli or with only visual stimuli.

Conclusions/significance: This advantage from stimulus congruency during training suggests that the benefits of multisensory training may result from audiovisual interactions at a perceptual rather than cognitive level.

Show MeSH