Given a text, write a compressed version of it in a single sentence.
Q: Longabaugh noted one matching effect that persisted throughout the post-treatment period in Project MATCH. Clients with high trait anger, who were therefore likely to resist directive interventions, were more successful with a motivational enhancement intervention.
A:
One effect that persisted through post-treatment in Project MATCH. Those with high trait anger, who were likely to resist interventions, were more successful with motivational enhancement.