Ten minutes with a friend before extinction
- 96 healthy adults aged 18 to 35 were conditioned to fear a cue paired with a mild shock and then randomised: 47 talked with a close friend for 10 minutes before extinction training on Day 2, 49 waited alone for 10 minutes. Everyone went through extinction alone.
- In the first block of extinction, the differential skin conductance response was 0.06 in the support group and 0.15 in the no-support group (F(1,94) = 12.585, p = 0.001).
- At 24 hours, a reminder shock reinstated the fear only in the no-support group (group effect F(1,93) = 19.495, p < 0.001). The group difference in spontaneous recovery was marginal (p = 0.075). A larger rise in perceived support went with a weaker reinstated response (r = -0.307).
- Two weeks later, 77 participants returned (35 and 42). The no-support group showed more spontaneous recovery (F(1,75) = 6.358, p = 0.014) and more reinstatement (F(1,75) = 10.783, p = 0.002). In the 59 participants scanned on Day 3, the support group showed lower activity in the hippocampus, thalamus and precuneus to the threat cue.
Exposure works through extinction, and extinction is fragile. A fear that went quiet in the session can come back the next day, or after one reminder of the original threat. A team at Peking University Sixth Hospital in Beijing tested whether a short conversation with a friend, held before extinction, changes how well it holds.
Ten minutes of talk, then the cue alone
On Day 1, 96 healthy volunteers learned that one coloured square predicted a mild electric shock to the wrist. On Day 2, 47 of them brought a close friend to the lab and spent 10 minutes talking about a moment of support or a happy memory, in detail and without physical contact. The other 49 waited alone for 10 minutes, without phones. Then everyone went through extinction training alone. The outcome was the difference in skin conductance between the threat cue and the safe cue.
Where the fear came back
The conversation raised perceived support on a 0 to 10 scale. Early in extinction the differential response was 0.06 after the conversation and 0.15 after waiting. At 24 hours, a reminder shock brought the fear back only in the group that had waited alone; the gap in spontaneous recovery was marginal. Two weeks later, among the 77 who returned, both spontaneous recovery and reinstatement were higher without support. The volunteers were healthy, not patients.
Before the session, not inside it
The friend left before extinction began, and each participant met the threat cue alone. For practice, that order is the point. A support person sitting in the room during exposure can become a safety behaviour: the client learns "I cope when she is here", and the fear returns when she is not.
If a client wants to involve someone close, follow the order used here. A conversation before the session, about something warm and unrelated to the fear, then exposure without them. Watch for the support drifting into the exposure itself: glancing at the phone for a message, putting off the start until the person arrives, refusing to begin without the call. Those are signals to fade it, as with any other safety behaviour.
Bring the close person in before exposure, then let the client meet the feared cue alone.
The participants were healthy young volunteers and the threat was a laboratory shock cue, not a clinical fear. The authors note that the conversations were not monitored, emotional arousal was not measured, and the type and length of friendship were not controlled, so they cannot say whether support itself, positive mood or distraction produced the effect. There was no fMRI at baseline, acquisition or extinction.