Imai et al., The cross-validated Mahalanobis distance values in the representational dissimilarity matrix (RDM)

1) The terms "execution," "imagery," and "execution-imagery" in the headline refer to within-execution, within-imagery, and cross-modality finger pairs, respectively.
2) D2 = index finger, D3 = middle finger, D4 = ring finger, and D5 = little finger.
3) The diagonal pairs (e.g., Execution D2 - Execution D2 pair) are excluded because all of their values equal 0.