The effects of mental representation on performance in a navigation task

Area of Science:

• Cognitive Psychology
• Human-Computer Interaction
• Spatial Cognition

Background:

• Understanding how humans process and follow navigation instructions is crucial for designing effective interfaces and training.
• Previous research suggests a link between spatial representation and memory, but the precise nature of this interaction in navigation tasks remains to be fully elucidated.

Purpose of the Study:

• To investigate the cognitive processes underlying the following of navigation instructions in a virtual environment.
• To examine the impact of instructional complexity (units vs. words) and spatial dimensionality (2D vs. 3D) on navigation performance and memory.

Main Methods:

• Three experiments were conducted using a grid-based computer interface for navigation tasks.
• Participants followed verbal instructions, with variations in the number of instructional units and words per unit.
• Navigation involved both two-dimensional (2D) and three-dimensional (3D) spaces, with performance and memory assessed.

Main Results:

• Navigation performance was more sensitive to the number of instructional units than the number of words.
• Performance in 3D space was unaffected by the number of navigational dimensions.
• Memory and accuracy decreased when mentally representing 3D space compared to 2D space, despite identical instructions.

Conclusions:

• The findings highlight the interdependence of verbal and spatial memory representations during navigation.
• Mental representation of space significantly influences immediate memory for verbal navigation instructions.
• Instructional design should prioritize the number of units over word count for optimal navigation guidance.