A biopsychosocial approach to investigating appetite self-regulation in children: The role of temperament in developmental trajectories, parent-child interactions, and brain activation

Ju, Sehyun

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https://hdl.handle.net/2142/130083 Copy

Description

Title

A biopsychosocial approach to investigating appetite self-regulation in children: The role of temperament in developmental trajectories, parent-child interactions, and brain activation

Author(s)

Ju, Sehyun

Issue Date

2025-07-09

Director of Research (if dissertation) or Advisor (if thesis)

Bost, Kelly

Doctoral Committee Chair(s)

Bost, Kelly

Committee Member(s)

• Donovan, Sharon
• Dolcos, Sanda
• McElwain, Nancy
• Tu, Kelly

Department of Study

Human Dvlpmt & Family Studies

Discipline

Human Dvlpmt & Family Studies

Degree Granting Institution

University of Illinois Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

• Appetite Self-Regulation
• Temperament
• Caregiver-Child Interaction
• Dyadic Synchrony
• Mutually Responsive Orientation
• Motion Energy Analysis
• Eating Behaviors
• Food Approach
• Food Withdrawal
• Emotion Regulation
• fMRI

Abstract

Appetite self-regulation (ASR) emerges in early childhood and continues to develop into middle childhood, with long-term implications for health and well-being. Its development is shaped by the interplay between individual biological and psychological characteristics and external socio-environmental influences, which together guide children’s tendencies to approach or withdraw from food. While ASR is often considered a domain-specific manifestation of general self-regulation, distinguishing the regulation of food intake from broader regulatory processes remains crucial for understanding its unique developmental pathways. A more nuanced understanding of ASR requires examination of how its development is shaped by children’s temperamental reactivity and regulatory capacity across homeostatic and hedonic motivational systems in response to environmental cues. Guided by the Biopsychosocial Pathways Model of Appetite Self-Regulation, this dissertation investigated how early temperamental traits influence the development of ASR, children’s susceptibility to caregiver-child mealtime interactions, and neural responses to socioemotional and food cues. Participants include children and families participating in the STRONG Kids 2 longitudinal birth cohort study (N = 468). Study 1 used latent growth modeling to examine how temperament predicts trajectories of food approach and withdrawal behaviors from 18 to 36 months. Negative affectivity predicted higher initial levels of both behaviors. Surgency was associated with a higher baseline level of food approach and a slower growth trajectory, while effortful control predicted a lower initial food approach and less pronounced increases over time. Study 2 explored the moderating effects of child temperament on the association between caregiver-child dyadic synchrony, assessed using both Mutually Responsive Orientation (MRO) and Motion Energy Analysis (MEA), and ASR outcomes. This study included a subsample of caregiver-child dyads observed during mealtimes at 18–24 months (n = 109). Findings showed that surgency and orienting/regulation moderated the association between caregiver-child interaction and both food approach and withdrawal behaviors, while negative affectivity had a direct association with food withdrawal. Study 3 assessed neural and behavioral responses to food and emotional stimuli using a shift-attention paradigm with functional magnetic resonance imaging (fMRI) and eye-tracking among children aged 6–10 years (n = 26). Focusing attention on negative emotional faces and unhealthy food cues elicited greater activation in emotion and reward-related regions, whereas shifting attention away from these emotionally salient components toward the neutral elements of the background engaged regulatory control regions. Activation in these regulatory regions varied by child temperament, suggesting differential engagement of top-down control mechanisms based on individual differences. Moreover, shifting attention away from the emotional components of the stimuli produced distinct regulatory outcomes for emotional versus food content, indicating that the effectiveness of attention modulation may be content-specific. Together, these studies highlight that ASR development is embedded in a complex interplay of temperament, caregiver-child relational dynamics, and neural regulatory processes. The findings support the Biopsychosocial Pathways Model of ASR and emphasize the importance of tailoring interventions and practices to align with individual differences in children’s temperamental characteristics.

Graduation Semester

2025-08

Type of Resource

Thesis

Handle URL

https://hdl.handle.net/2142/130083

Copyright and License Information

Copyright 2025 Sehyun Ju

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