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Fig. 2 | Orphanet Journal of Rare Diseases

Fig. 2

From: A study of voice and non-voice processing in Prader-Willi syndrome

Fig. 2

Hierarchical drift diffusion model for voices and nonvoices. This figure provides a scheme of the Bayesian estimation of the drift-diffusion model (a). The drift-diffusion model makes it possible to assess how much information individuals need to make a decision, thus separating decision criteria from non-decision processes. Different parameter of decision making are obtained (see Methods): the threshold (a); the drift rate (v) the non-decision reaction time (t) and the initial bias (z). The differences between the groups of participants concerning these parameters of the model are provided and compared in (b). For both voice and non-voice identification, DEL and UPD participants exhibited a similar pattern of changes in model parameters with respect to the TD participants. They had a higher threshold, a lower drift rate and longer non-decision times than controls. Their bias for voices was lower than in controls. Other conventions as in Fig. 1

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