Isolated processing of geometric shapes and their corresponding shape words: Evidence from a delayed match-to-sample...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Linguistics

Background:

• The existence of a domain-specific cognitive system for geometric processing is debated.
• Isolating geometric processing from linguistic and semantic factors presents a significant challenge.
• Previous research (Sturz et al., 2014) used a delayed match-to-sample task, revealing asymmetrical interference patterns.

Purpose of the Study:

• To replicate and extend findings on geometric information processing.
• To investigate the role of figure-ground relations and shape saliency.
• To test whether geometric shapes activate semantic representations.

Main Methods:

• Delayed match-to-sample tasks with shape, shape word, and bidimensional stimuli.
• Manipulation of figure-ground relations to control for shape saliency (Experiment 1).
• Confirmation of saliency manipulation effectiveness (Experiment 2).
• Reversal of sample-to-target matching criteria to assess semantic activation (Experiment 3).

Main Results:

• Asymmetrical interference patterns were replicated, challenging pure saliency explanations.
• Saliency manipulation effectiveness was confirmed.
• A symmetrical pattern emerged when matching criteria were reversed, suggesting semantic processing of shapes.

Conclusions:

• Results provide evidence for a cognitive system specialized in geometric information processing.
• This system appears to be separable from linguistic and semantic processing.
• Geometric shapes, when processed directly, engage both spatial and semantic representations.