Processing Speed throughout Primary School Education: Evidence from a Cross-Country Longitudinal Study

Area of Science:

• Cognitive Development
• Developmental Psychology
• Educational Psychology

Background:

• Processing speed is a key cognitive ability influencing academic performance.
• Longitudinal studies are crucial for understanding developmental trajectories.
• Cross-country comparisons offer insights into cultural and educational influences on cognitive growth.

Purpose of the Study:

• To investigate the developmental trajectory of processing speed in primary school children.
• To examine individual and average growth patterns of processing speed over four years.
• To compare processing speed development between children in Kyrgyzstan and Russia.

Main Methods:

• A four-year longitudinal study involving 441 pupils (grades 1-4).
• Mixed effects growth modeling to estimate average and individual growth trajectories.
• Latent class growth modeling to identify and compare different growth patterns.

Main Results:

• Processing speed significantly increased across primary school years.
• The most dynamic growth occurred between grades 1 and 2, with growth slowing by grade 4.
• No significant cross-country differences were observed in initial processing speed or its developmental changes.
• A model with three quadratic growth types minimally differed, suggesting homogeneity in development.

Conclusions:

• Processing speed development in primary school children is largely homogeneous.
• The most rapid gains in processing speed occur early in primary education (grades 1-2).
• Educational and cultural factors in Kyrgyzstan and Russia did not significantly impact processing speed development during this period.