Behavioral and neuroendocrine responses in shy children

Related Experiment Video

Updated: Nov 2, 2026

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Toddlers - Resting and Developmental Challenges
08:22

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Toddlers - Resting and Developmental Challenges

Published on: February 25, 2016

L A Schmidt1, N A Fox, K H Rubin

  • 1Institute for Child Study, University of Maryland, College Park 20742, USA.

Developmental Psychobiology
|March 1, 1997
PubMed

Insights

Infants with high motor activity and negative affect are more likely to be shy toddlers. High morning salivary cortisol in shy 4-year-olds may exacerbate fearfulness, potentially impacting the amygdala.

Area of Science:

  • Developmental Psychology
  • Behavioral Neuroscience
  • Endocrinology

Background:

  • Early childhood temperament, characterized by motor activity and negative affect, predicts later behavioral inhibition.
  • Temperamental profiles in infancy may serve as early indicators of social behavior and emotional regulation.
  • Understanding the biological underpinnings of shyness is crucial for early intervention strategies.

Purpose of the Study:

  • To investigate the longitudinal links between early temperamental profiles and later social behaviors, specifically shyness.
  • To examine the relationship between temperament, salivary cortisol levels, and startle responses in preschool-aged children.
  • To explore potential neurobiological mechanisms, such as cortisol and amygdala function, underlying behavioral inhibition and shyness.

Main Methods:

  • Longitudinal study tracking children from infancy to age 4.
  • Assessment of infant temperament (motor activity, negative affect) at 4 months.
  • Measurement of social behaviors (shyness, wary behavior), maternal temperament reports, salivary cortisol, and baseline startle responses at age 4.

Main Results:

  • Infants with high motor activity and negative affect were reported as more shy at age 4.
  • Wary behavior in 4-year-olds was associated with higher morning salivary cortisol, maternal reports of shyness, and earlier behavioral inhibition.
  • No significant correlation was found between baseline startle responses, salivary cortisol, and shyness at age 4.

Conclusions:

  • Early temperamental characteristics are predictive of later shyness and behavioral inhibition.
  • Elevated morning salivary cortisol in shy children may be linked to heightened fearfulness and potential amygdala alterations.
  • Further research is warranted to elucidate the neuroendocrine mechanisms contributing to the development and persistence of shyness.

More Related Videos

Psychophysiological Assessment of the Effectiveness of Emotion Regulation Strategies in Childhood08:09

Psychophysiological Assessment of the Effectiveness of Emotion Regulation Strategies in Childhood

Published on: February 11, 2017

Related Concept Videos

Relationships with Peers During Infancy and Toddlerhood01:26

Relationships with Peers During Infancy and Toddlerhood

Infants and toddlers show early interest in peers, especially children of similar age and developmental level. Between 6 and 12 months, infants increasingly touch, smile at, and babble to one another. These brief interactions often happen alongside individual play rather than as coordinated activity.Early Peer InteractionAround the first birthday, children begin sharing objects, making eye contact, smiling, and approaching peers. Behaviors such as hitting, grabbing, or repeated touching may...
Socioemotional Development during Infancy01:30

Socioemotional Development during Infancy

Socio-emotional development in infancy is primarily shaped by early emotional responses and social connections, with temperament playing a central role. Temperament refers to the consistent patterns in an individual's emotional and behavioral responses, observable even in infancy. By examining temperament, researchers can better understand an infant's unique ways of interacting with the world, influencing subsequent personality and socio-emotional growth.
Primary Temperament Types
Stella Chess...
Social Anxiety Disorder01:28

Social Anxiety Disorder

Social anxiety disorder, also known as social phobia, is characterized by an intense fear of social situations where one might face humiliation, rejection, embarrassment, or negative evaluation. This disorder leads individuals to avoid activities like casual conversations, public speaking, or seemingly simple tasks such as eating, signing documents, or swimming, in public settings. Its impact extends beyond discomfort, often significantly interfering with daily functioning and quality of life.
Bullying02:04

Bullying

A modern form of aggression is bullying. As you learn in your study of child development, socializing and playing with other children is beneficial for children’s psychological development. However, as you may have experienced as a child, not all play behavior has positive outcomes. Some children are aggressive and want to play roughly. Other children are selfish and do not want to share toys. One form of negative social interactions among children that has become a national concern is bullying.
Causes of Social Behavior III: Biological and Environmental Influences01:28

Causes of Social Behavior III: Biological and Environmental Influences

Social behavior is a complex phenomenon that arises from the interaction between biological predispositions and environmental influences. This intricate interplay shapes how individuals think, feel, and act in various social contexts. Understanding these mechanisms requires insights from psychology, neuroscience, genetics, and evolutionary theory.Environmental Influences on Social BehaviorEnvironmental factors, including temperature, odors, and visual stimuli, play a crucial role in shaping...
Theory of Romantic Attachment in Adulthood03:34

Theory of Romantic Attachment in Adulthood

Attachment is a long-standing connection or bond with others. While Attachment Theory was conceived in developmental psychology to describe infant-caregiver bonding, it's been extended into adulthood to include romantic relationships.