A Model of the Reference Frame of the Ventriloquism Aftereffect using a priori bias
Ing. Peter Lokša
Ústav informatiky, PF UPJŠ
The reference frame (RF) used by audio-visual (AV) spatial representation is likely to be head-centered or eye-centered, aligned with the RFs of either the unimodal auditory (head-centered) or visual (eye-centered) representations. Previous results are inconsistent, suggesting that the RF is either head-centered, when examined in the periphery, or a mixture of head-centered and eye-centered, when examined in the central field (Kopco et al., 2009; Loksa & Kopco, 2016). Here, a model is proposed, assumming a form of a priori bias is combined with the adaptation due to AV stimuli. This model can explain the results in the baseline conditions, but not when ventriloquism aftereffect is induced. Therefore, additional mechanisms are likely to determine the AV RF.