highly significantp = .004
As a further check that the interaction of Group with O-Span was not an artefact of ‘regressing out’ age effects within the older group which correlated with WMC, we also ran the model without age as a predictor, and the interaction of Group with O-Span remained highly significant (β = .47, t (33) = 3.14, p = .004; for model, R 2 = .32, F (3,31) = 4.84, MSE = 14.2, p = .007).