The Virtual City Paradigm^TM for Testing Visuo-Spatial Memory, Executive Functions and Cognitive Strategies in...

Area of Science:

• Neuroscience
• Developmental Psychology
• Human-Computer Interaction

Background:

• Navigation is a complex cognitive process essential for daily life.
• Executive functions (EFs), including working memory, inhibition, and planning, are critical for successful navigation.
• Children with Attention Deficit and Hyperactivity Disorder (ADHD) often exhibit impairments in EFs, potentially affecting their navigation abilities.

Purpose of the Study:

• To evaluate the feasibility and ecological validity of a novel navigation task, the Virtual City paradigm™ (VC™), for assessing visuo-spatial memory and EFs in children with ADHD.
• To explore the relationship between VC™ performance and established measures of visuo-spatial memory and EFs.
• To investigate potential differences in task approach between children with ADHD and typically developing children.

Main Methods:

• The Virtual City paradigm™ (VC™) utilizes Virtual Carpet™ technology and a motion capture system to create an interactive virtual town projected on the floor.
• Participants navigated the virtual city to reach target locations, with conditions requiring either direct navigation or planning the shortest path.
• Standardized neuropsychological tests assessed visuo-spatial short-term memory, working memory, inhibition, and planning skills.

Main Results:

• The VC™ demonstrated good feasibility, ecological validity, and high motivation levels among child participants.
• Performance metrics from the VC™ positively correlated with standardized measures of visuo-spatial short-term and working memory.
• Preliminary individual subject analyses indicated distinct navigation approaches in children with ADHD compared to typically developing peers.

Conclusions:

• The Virtual City paradigm™ (VC™) is a promising, ecologically valid tool for assessing visuo-spatial memory and executive functions in children, particularly those with ADHD.
• The task's reliance on spatial memory suggests its utility in identifying specific cognitive challenges.
• Further research with larger cohorts is warranted to elucidate the role of EFs in navigation and explore potential therapeutic interventions for ADHD.