Previous research has examined the consequences of either expressing or suppressing emotion using between-subjects designs. However, emotion theorists have argued that adaptation depends not so much on one regulatory process but rather on the ability to flexibly regulate emotion in accord with situational demands. To test this idea, Bonanno, Papa, Lalande, Westphal, and Coifman (2004) developed a within-subjects experimental paradigm to measure expressive flexibility (EF) and showed that EF predicted better self-reported adjustment over a 2-year period. The current investigation extends this research by (1) demonstrating the stability of EF across a 3-year period, (2) replicating the association between EF and positive adjustment using a more objective measure of adjustment (obtained from participants' close friends rather than based on self-report), and (3) by showing that the positive relation between EF and adjustment was particularly salient in the context of high levels of cumulative life stress when EF was measured under conditions of immediate threat (presence of a subliminal threat prime).