The two condition codes have a mean squared contrast correlation of 0.0597 in ds000102 snapshot 00001 run-2 models.

This study compares fMRI design vectors generated from two conflicting condition fields in OpenNeuro ds000102 snapshot 00001. The data include 26 participants and two runs each; no measured brain signal was analyzed. In run 2, the fields disagree on 304 of 624 trials. Under the specified model, the mean of 26 squared residual-contrast correlations is 0.05967342177587536 (median 0.034567927521668235; range 0.0000054682644110348634–0.25100659813081516), and nine signed correlations are negative. All run-1 contrasts agree exactly. Across eight prespecified model settings, mean run-2 squared correlation ranges from 0.05582115411772058 to 0.06287962693164471. These values describe model vectors, not measured brain variance or neural effects. The package retains all trial rows, source hashes, original analysis code, results, and method checks. The presented stimuli remain unknown, so the study cannot establish which field is correct. Motion, censoring, noise correlation, and actual brain effects were not tested.

functional magnetic resonance imaging · fMRI · design matrix · condition coding · flanker task · contrast correlation · OpenNeuro · reproducibility