ERIC Number: EJ775496
Record Type: Journal
Publication Date: 2007-Oct
Reference Count: 0
Frontal Brain Electrical Activity (EEG) and Heart Rate in Response to Affective Infant-Directed (ID) Speech in 9-Month-Old Infants
Santesso, Diane L.; Schmidt, Louis A.; Trainor, Laurel J.
Brain and Cognition, v65 n1 p14-21 Oct 2007
Many studies have shown that infants prefer infant-directed (ID) speech to adult-directed (AD) speech. ID speech functions to aid language learning, obtain and/or maintain an infant's attention, and create emotional communication between the infant and caregiver. We examined psychophysiological responses to ID speech that varied in affective content (i.e., love/comfort, surprise, fear) in a group of typically developing 9-month-old infants. Regional EEG and heart rate were collected continuously during stimulus presentation. We found the pattern of overall frontal EEG power was linearly related to affective intensity of the ID speech, such that EEG power was greatest in response to fear, than surprise than love/comfort; this linear pattern was specific to the frontal region. We also noted that heart rate decelerated to ID speech independent of affective content. As well, infants who were reported by their mothers as temperamentally distressed tended to exhibit greater relative right frontal EEG activity during baseline and in response to affective ID speech, consistent with previous work with visual stimuli and extending it to the auditory modality. Findings are discussed in terms of how increases in frontal EEG power in response to different affective intensity may reflect the cognitive aspects of emotional processing across sensory domains in infancy.
Descriptors: Metabolism, Visual Stimuli, Medicine, Intimacy, Fear, Infants, Affective Behavior, Brain Hemisphere Functions, Diagnostic Tests, Speech, Adults, Anxiety, Cognitive Processes
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A