title: Behavioral reactivity and approach-withdrawal bias in infancy.
abstract: Seven hundred seventy-nine infants were screened at 4 months of age for motor and emotional reactivity. At age 9 months, infants who showed extreme patterns of motor and negative (n = 75) or motor and positive (n = 73) reactivity and an unselected control group (n = 86) were administered the Laboratory Temperament Assessment Battery, and baseline electroencephalogram data were collected. Negatively reactive infants showed significantly more avoidance than positively reactive infants and displayed a pattern of right frontal electroencephalogram asymmetry. Positively reactive infants exhibited significantly more approach behavior than controls and exhibited a pattern of left frontal asymmetry. Results support the notion that approach-withdrawal bias underlies reactivity in infancy.
authors.affiliation: Department of Psychology, Williams College, Bronfman Science Center, Williamstown, MA 01267, USA. ahane@williams.edu
authors.forename: Amie Ashley
authors.initials: AA
authors.lastname: Hane
authors.forename: Nathan A
authors.initials: NA
authors.lastname: Fox
authors.forename: Heather A
authors.initials: HA
authors.lastname: Henderson
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Marshall
mesh_terms: D000367:Age Factors; D001362:Avoidance Learning / Q000502:physiology*; D003220:Conflict, Psychological; D004292:Dominance, Cerebral / Q000502:physiology; D004569:Electroencephalography; D004644:Emotions / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D005625:Frontal Lobe / Q000502:physiology*; D006801:Humans; D007206:Individuality; D007223:Infant; D018730:Infant Behavior / Q000502:physiology*; D008297:Male; D009043:Motor Activity / Q000502:physiology; D010552:Personality Assessment; D002666:Psychology, Child; D012919:Social Behavior; D013694:Temperament / Q000502:physiology
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