Developmental research of twin's temperament

Area of Science:

• Developmental Psychology
• Behavioral Genetics

Background:

• Understanding twin development is crucial for distinguishing genetic and environmental influences on behavior.
• Temperament and social behaviors are key developmental components in early childhood.

Purpose of the Study:

• To investigate the interplay between temperament and social behavior in young twins.
• To examine developmental transformations in these components between ages 3 and 4.
• To assess the concordance between laboratory observations and parental ratings of temperament.

Main Methods:

• Utilized standardized competitive and cooperative tasks in a laboratory setting with 3- and 4-year-old twins.
• Collected behavioral ratings of temperament and social components during tasks.
• Obtained parental ratings of twins' temperament.
• Conducted twin analyses on data from 43 twin pairs.

Main Results:

• Identified distinct temperament and social components at both ages.
• Observed significant transformations in the relationships between these components between ages 3 and 4.
• Found moderate correlations between observed and parent-rated temperament, with changing patterns across ages.
• Twin analyses explored similarities in MZ (monozygotic) and DZ (dizygotic) pairs regarding temperament.

Conclusions:

• Temperament and social behavior undergo significant transformations during early twin development.
• Both genetic and environmental factors likely contribute to temperament, as suggested by twin analyses.
• The relationship between observed and parent-reported temperament is dynamic and changes with age.