Age and the self-perception of ability: a twin study analysis

Area of Science:

• Psychology
• Behavioral Genetics
• Human Development

Background:

• Self-concept is a multifaceted construct crucial for individual functioning.
• Understanding the developmental trajectory and etiological factors of self-concept is essential.
• Previous research has explored various influences on self-concept, but its stability and origins across adulthood require further investigation.

Purpose of the Study:

• To investigate the influence of age and gender on self-rated abilities across six distinct factors.
• To examine the age-related stability of self-concept and its genetic and environmental underpinnings.
• To determine if genetic and environmental influences on self-concept change across adulthood.

Main Methods:

• Utilized data from 2,974 adults (678 monozygotic, 547 dizygotic twin pairs) aged 27-86 years.
• Assessed self-rated abilities across six domains: Interpersonal Competence, Workplace Skills, Trade Skills, Intellectual and Cultural, Domestic Skills, and Athletic Competition.
• Employed biometrical variance component modeling to estimate genetic and environmental influences on self-concept factors.

Main Results:

• Age explained minimal variance (<2%) in any self-rated ability factor.
• Significant gender effects were observed, but no significant Age x Gender interactions were found.
• Twin similarity remained consistent across age groups, with genetic and nonshared environmental factors contributing roughly equally to talent variance.

Conclusions:

• Self-concept appears to crystallize early in adulthood and demonstrates remarkable stability thereafter.
• Genetically influenced psychological characteristics play a significant role in shaping self-concept.
• Findings suggest that interventions or developmental support for self-concept may be most impactful during early adulthood.