ERIC Number: EJ849231
Record Type: Journal
Publication Date: 2009-Jul
Abstractor: As Provided
Reference Count: 53
Electrophysiological Responses to Auditory Novelty in Temperamentally Different 9-Month-Old Infants
Marshall, Peter J.; Reeb, Bethany C.; Fox, Nathan A.
Developmental Science, v12 n4 p568-582 Jul 2009
Behavioral reactivity to novel stimuli in the first half-year of life has been identified as a key aspect of early temperament and a significant precursor of approach and withdrawal tendencies to novelty in later infancy and early childhood. The current study examines the neural signatures of reactivity to novel auditory stimuli in 9-month-old infants in relation to prior temperamental reactivity. On the basis of the assessment of behavioral reactivity scores at 4 months of age, infants were classified into groups of high negatively reactive and high positively reactive infants. Along with an unselected control group, these groups of temperamentally different infants were given a three-stimulus auditory oddball task at 9 months of age which employed frequent standard and infrequent deviant tones as well as a set of complex novel sounds. In comparison to high positively reactive and control infants, high negatively reactive infants displayed increased amplitude of a positive slow wave in the ERP response to deviant tones compared to standard tones. In contrast, high positively reactive infants showed a larger novelty P3 to the complex novel sounds. Results are discussed in terms of optimal levels of novelty for temperamentally different infants.
Descriptors: Control Groups, Auditory Stimuli, Infants, Withdrawal (Psychology), Novelty (Stimulus Dimension), Responses, Child Development, Neurological Organization, Comparative Analysis, Personality Traits, Age Differences
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A