Fig. 4: The effect of selective attention on ocular speech tracking.
From: Eye movements track prioritized auditory features in selective attention to natural speech
a Differences in Fisher z-transformed prediction accuracies (∆ z’) between models that additionally included the speech envelope or acoustic onsets and a control model indicate significant tracking whenever speech was attended in a single speaker (bright purple) and multi-speaker (red) context. Post hoc comparison revealed stronger tracking of a target speaker compared to a simultaneously presented distractor (yellow) in the multi-speaker condition. No evidence for ocular speech tracking was found when speech was presented as a distractor to the visual modality (dark purple) b The temporal response functions (TRF) for speech envelope and acoustic onsets tracking. TRFs were resampled to 500 Hz for visualization. Center lines represent the mean, shaded areas represent 95% confidence intervals. Statistics were performed using Bayesian regression models. A ‘*’ within posterior distributions depicts a significant difference from zero (i.e. the 94%HDI does not include zero). Curly brackets indicate post hoc comparisons: ‘*’ = significant. N = 30.
