Skip to main content
. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Nat Neurosci. 2013 May 19;16(7):974–981. doi: 10.1038/nn.3402

Figure 5.

Figure 5

Neuronal responses to naturalistic textures in V2 predict perceptual sensitivity. (a) Stimuli were generated along an axis of “naturalness” by gradually introducing higher-order correlations (Fig. 1b). (b) Observers performed a 3AFC “oddity” task in which they viewed three images, two naturalistic and one noise (or vice versa), and indicated which looked different from the other two. All three images were synthesized independently (e.g., starting with statistically independent samples of Gaussian white noise). (c) Psychometric function: performance as a function of naturalness. Solid curves, best-fit cumulative Weibull function. Chance performance is 1/3. The two panels show two different texture families (same as in Fig. 4c) with different thresholds (defined as the level of naturalness required to obtain ~75% correct). (d) Correlation between psychophysical sensitivity (1/threshold) and single-unit modulation in V1 (green) and V2 (blue). Each data point represents a texture family. (e) Correlation between psychophysical sensitivity and fMRI modulation. Same format as panel d.