Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Eye contact and emotional face processing in 6-month-old infants: advanced statistical methods applied to event-related potentials
AU - Stahl, Daniel
AU - Parise, Eugenio
AU - Hoehl, Stefanie
AU - Striano, Tricia
PY - 2010/4
Y1 - 2010/4
N2 - Event-related potential (ERP) Studies with infants are often limited by,I small number of measurements. We introduce a weighted general linear mixed model analysis with,I time-varying covariate, which allows for the efficient analysis of all available event-related potential data of infants. This method allows controlling the signal to noise ratio effect on averaged ERP estimates due to small and varying numbers of trials. The method enables analyzing ERP data sets of infants, Which Would often not be possible otherwise. We illustrate this method by analyzing an experimental study and discuss the advantages in comparison to currently used methods as well as its potential limitations. In this Study, 6-month-old infants saw a face showing I neutral or an angry expression in combination with direct or averted eye gaze. We examined how the infant brain processes facial expressions and whether the direction of eye gaze has an influence oil it. We focused Oil the infant Negative Central ERP component (Nc). The neutral expression elicited larger amplitude and peaked earlier than the angry expression. An interaction between emotion and gaze was found for Nc latency, Suggesting that emotions are processed in combination with eye gaze in infancy.
AB - Event-related potential (ERP) Studies with infants are often limited by,I small number of measurements. We introduce a weighted general linear mixed model analysis with,I time-varying covariate, which allows for the efficient analysis of all available event-related potential data of infants. This method allows controlling the signal to noise ratio effect on averaged ERP estimates due to small and varying numbers of trials. The method enables analyzing ERP data sets of infants, Which Would often not be possible otherwise. We illustrate this method by analyzing an experimental study and discuss the advantages in comparison to currently used methods as well as its potential limitations. In this Study, 6-month-old infants saw a face showing I neutral or an angry expression in combination with direct or averted eye gaze. We examined how the infant brain processes facial expressions and whether the direction of eye gaze has an influence oil it. We focused Oil the infant Negative Central ERP component (Nc). The neutral expression elicited larger amplitude and peaked earlier than the angry expression. An interaction between emotion and gaze was found for Nc latency, Suggesting that emotions are processed in combination with eye gaze in infancy.
KW - VISUAL RECOGNITION MEMORY
KW - Emotional expressions
KW - Nc component
KW - GAZE
KW - FACIAL EXPRESSIONS
KW - Eye gaze
KW - LOOKING
KW - 4-MONTH-OLD
KW - ERP
KW - Weighted mixed model analysis
KW - ATTENTION
KW - Infants
U2 - 10.1016/j.braindev.2009.04.001
DO - 10.1016/j.braindev.2009.04.001
M3 - Journal article
VL - 32
SP - 305
EP - 317
JO - Brain and Development
JF - Brain and Development
SN - 0387-7604
IS - 4
ER -