The sustained effect of emotional signals on neural processing in 12-month-olds

Area of Science:

• Developmental psychology
• Cognitive neuroscience
• Social cognition

Background:

• Infants develop social referencing around 12 months of age, using emotional cues from caregivers to guide behavior.
• Previous research primarily focused on behavioral changes, with less emphasis on underlying neural mechanisms.
• Event-related potentials (ERPs) offer a method to investigate neural responses associated with social referencing.

Purpose of the Study:

• To examine changes in infants' neural responses (ERPs) during social referencing.
• To differentiate neural processing of positive, negative, and neutral emotional information.
• To understand how attentional engagement influences neural responses to emotional cues.

Main Methods:

• Twenty-six 12-month-old infants participated in a single-session study.
• ERPs were recorded before and after a caregiver-mediated behavioral intervention.
• Caregivers provided positive, negative, or neutral emotional information about three stimuli.

Main Results:

• Infants showed increased neural resources for processing negative information compared to neutral and positive information post-intervention.
• Neural responses were sustained in negative and positive conditions and decreased in the neutral condition (attenuation effect).
• Infants with higher attention to objects exhibited increased neural responses to negative cues and decreased responses to positive cues.

Conclusions:

• Infants' neural processing is differentially modulated by positive, negative, and neutral social information.
• Measuring changes in neural responses is crucial for interpreting post-experience social referencing.
• This study provides insights into the neural underpinnings of early social-emotional learning and decision-making.