Figure 1
From: Brain-correlates of processing local dependencies within a statistical learning paradigm
The experimental paradigm and auditory stream inside and outside the scanner. (A) The four triplets generated from the 6 sounds. The letters A to E are used to refer to the sounds. The first two items of the triplet form the root (AB and CD) and the last item the triplet ending (E or F). Statistical deviants were created by varying the transitional probability from root to ending within two levels, high (p = 0.9) and low (p = 0.1). Triplet roots (AB or CD) were occurring with a constant transitional probability (p = 0.5) from all of the triplet endings (E or F). (B) The auditory stream throughout the learning phase outside the scanner. The triplets were pseudorandomly concatenated and were either “Standard triplets” with high-probability endings (p = 0.9) or “Deviant triplets” with low-probability endings (p = 0.1). (C) The auditory stream inside the scanner. Scanning comprised of a single run of approximately 31 min in duration during which 6 blocks of 4.5 min duration each, interleaved with resting periods of 30 sec were presented. Within each block, 10 trials of 27 sec duration each were concatenated. In each trial, 27 consecutive standard triplets were presented followed by 3 deviant triplets.
