Investigating the representation of uncertainty in neuronal circuits
Fig 2
Ideal observer reproduces owl localization behavior.
(A) In the auditory localization task, the azimuth of the sound source has to be estimated using the ITD (denoted by δ). (B) Barn owl head-turning responses at different levels of BC. Each curve corresponds to a different value of the true ITD. At low BC, head turns are on average biased towards the front (0 deg). (C) Variability of the head-turning responses. Different symbols correspond to different true ITDs. The continuous line is an exponential fit. At low BC, responses are more variable. (B,C) Replotted from Saberi et al (1998). Angles are measured with a precision of 4°. (D,E) Same as (B,C) but for the post-marginalization ideal observer. The true azimuth (values reported in the inset) is indicated by the dashed lines in (D).