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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Eur J Neurosci. 2012 Jul 11;36(7):2996–3004. doi: 10.1111/j.1460-9568.2012.08223.x

Fig. 1. Stimuli.

Fig. 1

A sequence of triangles was centrally presented on a screen. Stimuli consisted of 15% targets (downward-facing triangle) and 85% of equal amounts of three types of standard stimuli: triangles facing upward (randS2), left (randS1), and right (randS3). A random sequence of standards preceded non-predictable random targets (randT); whereas a predictive sequence of three standards facing left, upward and right always preceded predictable targets (predT). Triangles of the predictive sequence are labeled as predS1, predS2 and predS3 stimuli. predS3 is the decisive stimulus 100% predicting a subsequent target.