TY  - JOUR
A1  - Nixon, Jessie S.
A1  - van Rij, Jacolien
A1  - Mok, Peggy
A1  - Baayen, Harald R.
A1  - Chen, Yiya
T1  - The temporal dynamics of perceptual uncertainty: eye movement evidence from Cantonese segment and tone perception
JF  - Journal of memory and language
N2  - Two visual world eyetracking experiments investigated how acoustic cue value and statistical variance affect perceptual uncertainty during Cantonese consonant (Experiment 1) and tone perception (Experiment 2). Participants heard low- or high-variance acoustic stimuli. Euclidean distance of fixations from target and competitor pictures over time was analysed using Generalised Additive Mixed Modelling. Distance of fixations from target and competitor pictures varied as a function of acoustic cue, providing evidence for gradient, nonlinear sensitivity to cue values. Moreover, cue value effects significantly interacted with statistical variance, indicating that the cue distribution directly affects perceptual uncertainty. Interestingly, the time course of effects differed between target distance and competitor distance models. The pattern of effects over time suggests a global strategy in response to the level of uncertainty: as uncertainty increases, verification looks increase accordingly. Low variance generally creates less uncertainty, but can lead to greater uncertainty in the face of unexpected speech tokens. (C) 2016 Elsevier Inc. All rights reserved.
KW  - Discriminative learning
KW  - Statistical learning
KW  - Speech perception
KW  - Cantonese
KW  - Lexical tone
Y1  - 2016
U6  - https://doi.org/10.1016/j.jml.2016.03.005
SN  - 0749-596X
SN  - 1096-0821
VL  - 90
SP  - 103
EP  - 125
PB  - Elsevier
CY  - San Diego
ER  -