Extended Data Fig. 3: fMRI design matrices.
From: Activation and disruption of a neural mechanism for novel choice in monkeys
Correlations among task-related regressors (averaged across sessions) in all GLMs. In addition, for GLM 1 (a) the 13 motion regressors and the first 10 low-quality volume regressors are also illustrated. For all other GLMs, these regressors are not illustrated. Colours represent the average across subjects (n = 4) and sessions (n = 12, 12, 3, 5 in a–d, respectively). Black contour: regressors of interest. a, GLM 1: experiment 1 decision task, value comparison analysis, all trials. b, GLM 2: experiment 1 decision task, value comparison analysis, trials divided by condition depending on familiarity and dimensionality. There are six copies of each decision-related regressor. c, GLM 3: experiment 2 single-option task, repetition suppression analysis. There are six copies of each decision-related regressor, one per condition depending on the preceding stimulus. d, GLM 4: experiment 2 single-option task, grid-code analysis. There are two copies of each decision-related regressor: valid and invalid trials. Correlations here shown for sixfold modulations of the BOLD signal; they were similar for other periodicities (fourfold to eightfold), as well as for the two halves of the phase consistency design.
