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. 2018 Mar 28;5(3):170909. doi: 10.1098/rsos.170909

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© 2018 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — Recalibration effect after McGurk illusion. (a) After a fused McGurk stimulus, the sensitivity (d′) was on average smaller (orange) than after auditory /aba/ (blue) or /ada/ (green). The criterion shifted away from /ada/ after McGurk as well as after /ada/ trials implying a bias towards the previous percept ‘ada’. N = 54. (***p < 0.001; n.s., non-significant). (b) Recalibration is strongest for the same noise level. The percentage of ‘ada’ percepts during auditory /aba/ (i) and /ada/ trials (ii) are shown. When the noise level on the previous and current trial was the same (both low or high, black circles), participants often misperceived /aba/ as ‘ada’ after a McGurk illusion (McGurk i.). If the noise was only high on the previous or current trial (grey triangles), the effect was weaker. This figure illustrates the four-way interaction between current condition × previous condition × current noise × previous noise. Error bars display within-subjects standard errors.