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January 24, 2026JASA Express Letters0 citationsOpen Access

A model of the reference frame of the ventriloquism aftereffect and saccade adaptation

Key Points

The research aims to extend the model of the reference frame of the ventriloquism aftereffect (RFoVAE) to include saccade adaptation.
Developed an extended model addressing saccade-to-sound responses.
Considered adaptations of saccades in response to auditory and visual stimuli.
Analyzed available data related to RFoVAE and saccadic responses.
The extended model accounts for all available RFoVAE data.
Suggests that RFoVAE is primarily head-centered.
Demonstrates that saccadic adaptation influences observed mixed reference frames.

Abstract

Lokša and Kopco Trends Hearing. 27, 23312165231201020 (2023) introduced a model of the reference frame of the ventriloquism aftereffect (RFoVAE) that described many but not all available RFoVAE data by assuming that the auditory spatial map, natively using the head-centered RF, is adapted by visual signals in both eye-centered and head-centered RFs. Here, the model is extended primarily by considering that, when saccade-to-sound responses are used to measure ventriloquism, the saccades also undergo an adaptation. The extended model can explain all available data, suggesting that the RFoVAE is largely head-centered, while saccadic adaptation, which is nominally eye-centered, accounts for the mixed RF observed experimentally.

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