RELATIONS BETWEEN INTRA‐MODAL AND CROSS‐MODAL MATCHING

Abstract

Accuracy in matching was investigated cross‐modally (touch and vision) and intra‐modally. The stimuli were surfaces of sand‐paper. Two experiments showed (a) that matched stimuli are linearly related to the standard stimuli for the two intra‐modal conditions, whereas non‐linear relations (power‐functions) were obtained in the two cross‐modal conditions (touch‐vision and vision‐touch), (b) that the variance of matched stimuli is approximately three times as large when matching is performed cross‐modally as compared to intra‐modal matching. Data were analyzed according to a model which suggests that the correlation between discriminal dispersions belonging to the same modality is higher than the correlation between discriminal dispersions arising from two modalities.

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