Context effects are examined by comparing the performance at nine digit lists (constant context) with the performance at the same lists presented between a larger number of longer lists (variable context). Output order and rehearsal instruction were factorially combined. The following results emerged. (a) The size of the context effect with a free output order instruction depends upon the degree to which subjects are inclined to use different output procedures in both contexts. (b) Rehearsal affects output order independently of context. (c) In the constant context only the recency effect is a little larger than in the variable context. These results raise problems for a pure rehearsal strategy explanation. © 1976.