Evidence that implementation intentions reduce self-harm in the community

Area of Science:

• Psychology
• Behavioral Science
• Public Health

Background:

• Self-harm is a significant public health concern.
• Implementation intentions are IF-THEN plans designed to facilitate goal-directed behavior.
• Previous research suggests implementation intentions can influence behavior, but their efficacy in reducing self-harm requires further investigation.

Purpose of the Study:

• To investigate the effectiveness of an intervention promoting implementation intentions in reducing self-harm within a community sample.
• To explore potential moderators, such as goal intention, mental imagery, and exposure to self-harm, that might influence the intervention's impact.

Main Methods:

• A randomized controlled trial was conducted with 469 participants (aged 18-66).
• Participants completed self-report questionnaires measuring self-harm, suicidality, goal intention, mental imagery, and exposure to self-harm at baseline and three-month follow-up.
• Participants were randomized to either an experimental condition (forming implementation intentions) or a control condition.

Main Results:

• No overall significant differences in self-harm or suicidality were found between the experimental and control groups at three-month follow-up.
• However, a significant moderation effect was observed: participants in the experimental group with high levels of goal intention and mental imagery reported reduced self-harm in specified critical situations.
• Exposure to self-harm did not moderate the intervention's effect.

Conclusions:

• Implementation intentions can be a useful intervention for reducing self-harm in specific, pre-defined critical situations.
• The intervention appears particularly beneficial for individuals motivated to avoid self-harm and those experiencing frequent self-harm-related mental imagery.
• Future research should focus on tailoring implementation intention strategies to specific populations and self-harm contexts.