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Sensitivity to the temporal structure of rapid sound sequences - An MEG study.

Andreou LV, Griffiths TD, Chait M - Neuroimage (2015)

Bottom Line: Analysis of the latency of offset responses revealed that the temporal structure of (even rather simple) regular sequences is not learnt precisely when the sequences are ignored.Pattern coding, supported by a network of temporal, parietal and frontal sources, improved considerably when the signals were made behaviourally pertinent.Thus, contrary to what might be expected in the context of an 'early warning system' framework, learning of temporal structure is not automatic, but affected by the signal's behavioural relevance.

View Article: PubMed Central - PubMed

Affiliation: UCL Ear Institute, 332 Gray's Inn Road, London WC1X 8EE, UK.

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Comparison of offset latencies obtained in Experiment 2a (two possible IOI permutations) and Experiment 2b (one IOI permutation). No significant difference indicates that increased offset latency in Experiment 2 is not due to pattern variability.
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f0015: Comparison of offset latencies obtained in Experiment 2a (two possible IOI permutations) and Experiment 2b (one IOI permutation). No significant difference indicates that increased offset latency in Experiment 2 is not due to pattern variability.

Mentions: Offset response latencies in Experiment 1 (see Results) are used as a benchmark against which data from Experiments 2 and 3 are compared. Statistical analysis involves mixed design repeated measure ANOVAs with IOI condition as a within-subject measure and experiment as between-subject measure. These are followed by (Bonferroni corrected) post hoc analyses to assess any significant main effects. The Greenhouse–Geiser correction was used when required. Homogeneity of variance was assessed with Levene's test. The single instance in which this test indicated potential differences is between Exp2a and Exp2b (as expected due to the very different subject numbers; and as evident from Fig. 3). In all other cases there was no evidence of differences (p > 0.133 for all).


Sensitivity to the temporal structure of rapid sound sequences - An MEG study.

Andreou LV, Griffiths TD, Chait M - Neuroimage (2015)

Comparison of offset latencies obtained in Experiment 2a (two possible IOI permutations) and Experiment 2b (one IOI permutation). No significant difference indicates that increased offset latency in Experiment 2 is not due to pattern variability.
© Copyright Policy - CC BY
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4389832&req=5

f0015: Comparison of offset latencies obtained in Experiment 2a (two possible IOI permutations) and Experiment 2b (one IOI permutation). No significant difference indicates that increased offset latency in Experiment 2 is not due to pattern variability.
Mentions: Offset response latencies in Experiment 1 (see Results) are used as a benchmark against which data from Experiments 2 and 3 are compared. Statistical analysis involves mixed design repeated measure ANOVAs with IOI condition as a within-subject measure and experiment as between-subject measure. These are followed by (Bonferroni corrected) post hoc analyses to assess any significant main effects. The Greenhouse–Geiser correction was used when required. Homogeneity of variance was assessed with Levene's test. The single instance in which this test indicated potential differences is between Exp2a and Exp2b (as expected due to the very different subject numbers; and as evident from Fig. 3). In all other cases there was no evidence of differences (p > 0.133 for all).

Bottom Line: Analysis of the latency of offset responses revealed that the temporal structure of (even rather simple) regular sequences is not learnt precisely when the sequences are ignored.Pattern coding, supported by a network of temporal, parietal and frontal sources, improved considerably when the signals were made behaviourally pertinent.Thus, contrary to what might be expected in the context of an 'early warning system' framework, learning of temporal structure is not automatic, but affected by the signal's behavioural relevance.

View Article: PubMed Central - PubMed

Affiliation: UCL Ear Institute, 332 Gray's Inn Road, London WC1X 8EE, UK.

Show MeSH