Measuring executive function in preschoolers: Is a single assessment occasion sufficient?

Area of Science:

• Developmental Psychology
• Cognitive Science
• Child Psychology

Background:

• Executive function (EF) is crucial for cognitive and academic development in early childhood.
• Previous research has not fully clarified the stability of EF measures in preschoolers.
• Understanding the stability of EF is vital for accurate assessment and intervention.

Purpose of the Study:

• To determine if a single assessment occasion is adequate for measuring executive function in preschoolers.
• To differentiate between trait-like (stable) and state-like (transient) influences on EF task performance.
• To provide empirical evidence on the reliability of EF measures across multiple time points.

Main Methods:

• Longitudinal study involving 283 preschoolers (aged 3-5 years) from diverse backgrounds.
• Administration of a comprehensive battery of executive function tasks across three separate occasions within an academic year.
• Application of longitudinal bifactor models to analyze task performance and decompose variance into trait and state components.

Main Results:

• Most reliable variance in executive function task scores (50%-89%) was attributed to stable, trait-level influences.
• State-level influences accounted for a smaller proportion of variance in EF tasks (32%-36%), particularly in comparison tasks like reaction time and attention.
• This study is the first to quantify the relative contributions of state and trait influences on EF measures in young children.

Conclusions:

• A single assessment occasion may not fully capture the stable aspects of executive function in preschoolers.
• Both stable (trait) and fluctuating (state) factors influence EF task performance, necessitating consideration in measurement approaches.
• Future research and assessment practices should incorporate longitudinal designs to accurately measure executive function in early childhood.