Related Experiment Video
Updated: May 14, 2026

Generating Strictly Controlled Stimuli for Figure Recognition Experiments
Published on: March 18, 2019
Finding the spatial-numerical association of response codes (SNARC) in signed numbers: notational effects in
Alessandro Chinello1, Maria Dolores de Hevia, Carlo Geraci
1Center for Mind and Brain Sciences, University of Trento, Italy.
Abstract:
The present study investigates basic numerical processing in deaf signers and hearing individuals by evaluating notational effects (Arabic digits vs Italian sign language number signs) and response modality (manual vs pedal) in a parity judgment task. Overall, a standard SNARC effect emerged in both groups, suggesting similar numerical representation in hearing and deaf individuals. With the exception of Italian sign language stimuli in the hearing group, this effect applied to all stimuli notations and to both response modalities. In line with the special status of signs, the visuospatial complexity of finger configurations (i.e. number of extended fingers) affected the performance of the hearing group to a greater extent. Finally, the SNARC effect emerged systematically across lateralized effectors(manual/pedal response), challenging the hypothesis that the stimulus-response compatibility effect is specific to the effectors associated with the production of written and sign language. As for parity processing, both groups were similarly influenced by the parity information conveyed by the dominant hand, indicating the compositional nature of number signs irrespective of the preferred language modality.
Related Concept Videos
Sign Test for Nominal Data
For example, consider a...
Sign Test for Matched Pairs
To conduct the sign test, we first calculate the differences in value between...
McNemar's Test
Introduction to the Sign Test
Real Number Operations
Correlations

