The main effect of group approached significance, F(1, 46) = 3.46, p = .07, η P 2 = .07 (words recalled: CM group = 6.00, Control group = 7.04, and there was a main effect of retention interval, F(1, 46) = 67.26, p<.0001, η P 2 = .60 (immediate recall = 7.44 words, delayed recall = 5.60 words), but group did not interact with retention interval (p = .71) (see Figure 2 ).
Results The CM group showed performance decrements relative to the controls in response inhibition (Stroop interference), working memory computational speed (Ospan), and processing speed (automated digit symbol substitution task), but group differences in recall did not reach statistical significance.
This suggests that the marginally significant group effects in recall were associated with a variable related to anxiety and depression—likely chronic pain.