Using pupil dilation, eye-blink rate, and the value of mother to investigate reward learning mechanisms in infancy.
Eye-blink rate
Infant learning
Pupil diameter
Reward learning
Journal
Developmental cognitive neuroscience
ISSN: 1878-9307
Titre abrégé: Dev Cogn Neurosci
Pays: Netherlands
ID NLM: 101541838
Informations de publication
Date de publication:
04 2019
04 2019
Historique:
received:
08
05
2018
revised:
29
10
2018
accepted:
11
12
2018
pubmed:
26
12
2018
medline:
16
11
2019
entrez:
25
12
2018
Statut:
ppublish
Résumé
The brain is adapted to learn from interactions with the environment that predict or enable the procurement of rewards (Schultz, 2010). For infants, the main caregiver (often the mother) is most associated with primary biological rewards such as food and warmth, as well as the most likely provider of emotional and social rewards such as comfort and responsiveness. In this study we capitalize on the reward value of mother to examine reward learning mechanisms in infancy using multiple eye-tracking measures. Converging lines of research have demonstrated links between reward-related striatal dopamine activity and measurable changes in spontaneous eye-blink rate (EBR) and pupil dilation (Eckstein et al., 2017). We presented 7-month-old infants with video stimuli that parametrically increased in social-emotional value (male stranger, female stranger, mother) or in visual attention value (static image, slowed silent cartoon, dynamic cartoon). After establishing infants' baseline responses to these stimuli, we paired the videos with arbitrary shape cues in an associative learning task. Infants showed superior learning from their own mother's video and a heightened anticipatory arousal response to the mother-associated cue following learning. Both learning measures were predicted by infants' baseline EBR to their mother's video, providing the first evidence of reward learning and transfer in human infants.
Identifiants
pubmed: 30581124
pii: S1878-9293(18)30100-2
doi: 10.1016/j.dcn.2018.12.006
pmc: PMC6698145
mid: NIHMS1529722
pii:
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
100608Subventions
Organisme : NIMH NIH HHS
ID : F32 MH108278
Pays : United States
Organisme : NIMH NIH HHS
ID : R01 MH099078
Pays : United States
Informations de copyright
Copyright © 2019 The Authors. Published by Elsevier Ltd.. All rights reserved.
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