Table 2.

Responses on feedback questionnaire about participation from each participant at 1 month.

Feedback questionnaire about participation	P1	P2	P3
“If a friend or colleague has gone through a similar event, how likely is it that you would recommend this task?”a	10	10	10
“How easy did you find it to do the task?”a,b	9	1	10
“How upsetting did you find it to do the task?”b	1	0	0
“How much did you appreciate having something to do?”b	9	1	2
“How acceptable did you find the task?”b	9	10	10
“Received other treatment due to the traumatic event”c	No	No	No
“Did task on their own (i.e., after the researcher-led session)”c	Yes	Yes	Yes
“How often?”c	3-4	8	Daily for the first 2 weeks, after that every now and then
“Have you talked to others (e.g. friends, colleagues) about the task?”d	Yes	Yes	Yes

^aRated on an 11-point scale from 0 (not at all) to 10 (extremely/very much).

^bIn this study, task refers to the intervention as a whole. The wording in this questionnaire is adapted for use in the randomized controlled trial, where task can refer to either intervention or control.

^cFree-text response field.

^dYes/no response.