Psychology Research Works

Permanent URI for this collectionhttp://hdl.handle.net/1903/1645

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    Personal familiarity influences the processing of upright and inverted faces in infants.
    (2010) Balas, B; Nelson, C. A.; Westerlund, A; Vogel-Farley, V; Riggins, T; Kuefner, D
    Infant face processing becomes more selective during the fi rst year of life as a function of varying experience with distinct face categories defi ned by species, race, and age. Given that any individual face belongs to many such categories (e.g. A young Caucasian man’s face) we asked how the neural selectivity for one aspect of facial appearance was affected by category membership along another dimension of variability. 6-month-old infants were shown upright and inverted pictures of either their own mother or a stranger while event-related potentials (ERPs) were recorded. We found that the amplitude of the P400 (a face-sensitive ERP component) was only sensitive to the orientation of the mother’s face, suggesting that “tuning” of the neural response to faces is realized jointly across multiple dimensions of face appearance.
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    Event-related potentials in developmental populations.
    (2005) DeBoer, T.; Scott, L.S.; Nelson, C.A.
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    Forming a stable memory representation in the first year of life: Why imitation is more than child's play.
    (2005) Lukowski, A.F.; Wiebe, S.A.; Haight, J.C.; DeBoer, T.; Nelson, C.A.; Bauer, P.J.
    Although 9-month-old infants are capable of retaining temporally ordered information over long delays, this ability is relatively fragile. It may be possible to facilitate long-term retention by allowing infants to imitate event sequences immediately after their presentation. The effects of imitation on immediate and delayed recognition and on long-term recall were investigated using event-related potentials (ERPs) and elicited imitation, respectively. Mnemonic facilitation resulting from the opportunity to imitate was apparent using both assessments. ERP assessments at immediate and delayed recognition tests suggested that infants who were allowed to imitate had stronger memory representations of familiar stimuli relative to infants who only viewed the presentation of the events. In addition, infants who were allowed to imitate evidenced higher levels of ordered recall after 1 month relative to infants who only watched the experimenter’s demonstration. Therefore, imitation proved to have beneficial effects on explicit memory in 9 1 / 2 -month-olds, providing evidence of its effectiveness as a tool to augment mnemonic capabilities in infancy.