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. Author manuscript; available in PMC: 2012 Sep 3.
Published in final edited form as: J Exp Psychol Hum Percept Perform. 2009 Jun;35(3):700–717. doi: 10.1037/a0013553

Figure 2.

Figure 2

Generative model for the Eriksen task. (A) When si = H, each xi(t) is drawn from a normal distribution centered at −1; for si = S, the samples are drawn from a similar distribution centered at 1. Thus, a single sample confers partial and noisy information about the underlying stimulus. (B) Within a trial, a fixed setting of si gives rise to iid samples of xi(t) over time. (C) In the compatibility bias model, the prior probability over compatible is greater than chance: β > .5. Each xi depends only responds to one stimulus si and not to the others. (D) Spatial uncertainty model: p(xi(t)|s) depends not only on si but also the neighboring stimuli.