When Suppression Training Helps: The Fear-Suppression Experiment

The most informative challenge to the universal rebound story comes from a controlled training study of thought suppression, not from a reassuring anecdote. Mamat and Anderson asked whether people could repeatedly stop retrieval of personally meaningful fears without making those fears more accessible or distressing later. The study helps readers judge what suppression training can do under a defined protocol—and where that result stops applying.

A safer test of a dangerous assumption

The researchers began with a specific concern. Anxiety, post-traumatic stress, and depression often involve intrusive thoughts, memories, or imagined threats. Conventional advice has frequently warned that suppressing such material will make it return more strongly. If that warning were correct, deliberately training people to suppress fears could create an unacceptable risk. The study therefore tested both sides of the question: did suppression improve control, and did it produce an ironic increase in fear, memory, or emotional intensity?

The design was built to separate suppression of feared content from the general effects of taking part in an intensive exercise. The final sample contained 120 adults from 16 countries. Participants generated future events that mattered to them: feared events, neutral events, and positive hopes. Each event was paired with a cue word and a personal key detail so that later tests could examine not only whether the event was remembered, but also how vivid and emotionally charged it remained.

Participants were randomly assigned to one of two primary conditions. One group practiced suppressing retrieval of feared future events; the other practiced suppressing retrieval of neutral events. The neutral-suppression group was the comparison, not an untreated control. Both groups spent time generating events, meeting with an experimenter, learning the task, and practicing suppression. If mental health improved simply because people received attention, completed a demanding exercise, or learned a general control skill, both groups could improve. A larger change in the fear-suppression group would provide evidence that the valence of the suppressed content mattered.

The training used an Imagine/No-Imagine task. A cue appeared on screen. On Imagine trials, participants retrieved and elaborated the associated event. On No-Imagine trials, they recognized which event the cue referred to and then stopped further imagery and associated details. They were instructed not to replace the event with another thought. That detail is crucial. The intervention tested cue-driven retrieval stopping, not the White Bear instruction to monitor a named thought for several minutes.

Training lasted three consecutive days. Afterward, the researchers tested memory for the events, their vividness, and their affective tone. They also assessed mental-health indicators immediately after training and again three months later. The event-level tests and the mental-health tests answered different questions. A suppressed fear could become less vivid without changing a depression score, or a person could report feeling better without showing a measurable change in memory. Treating these as one outcome would hide the study’s actual logic.

The study also included matched baseline events.