# Developmental trajectories of visual temporal integration and segregation in children with and without developmental dyslexia

## TL;DR

This study explores how children with and without dyslexia process visual information over time, finding differences in accuracy and speed that may relate to memory and developmental patterns.

## Contribution

The study identifies distinct developmental trajectories for visual temporal integration and segregation in children with dyslexia.

## Key findings

- Children with dyslexia showed lower accuracy and slower reaction times for longer temporal intervals.
- Efficiency improved with age only in children with dyslexia, especially for integration tasks.
- Deficits in visual temporal processing may be linked to working memory limitations in dyslexia.

## Abstract

In the present study, 43 Italian school‐age children (age range = 7–14 years, 16 females) with (N = 19) and without DD (N = 24) were presented with pairs of visual displays separated by varying interstimulus intervals and performed either a temporal integration or segregation task despite an identical visual input. Children with DD had lower accuracy and slower RTs for longer temporal intervals. Additionally, efficiency (combined accuracy and speed trade‐off) increased as a function of age only in the DD group, most markedly for the integration condition. Results suggest that visual temporal processing deficits in DD may depend on short‐term/working memory liability as well as the existence of possibly differentiated developmental trajectories for integration and segregation abilities.