Test specific predictions about the consequences of changes in shape, weight, or eating.
Many eating disorder beliefs make specific predictions: "If I eat normally, I'll gain 5kg in a week" or "If I stop exercising, my body will completely change shape." Test these predictions systematically.
Use in Stage 3 of CBT-E when directly challenging over-evaluation of shape and weight. Appropriate once the client can articulate specific beliefs about shape/weight and their perceived consequences (e.g., 'If I gain weight, people will reject me').
Identify a specific shape/weight belief collaboratively and design an experiment to test it. Frame as gathering evidence rather than proving the belief wrong. Ensure the client understands they are testing a prediction, not being asked to accept weight gain.
Start with less threatening experiments (e.g., wearing slightly fitted clothing) before progressing to more challenging ones. For clients with social anxiety comorbidity, distinguish shape/weight beliefs from broader social evaluation fears.
Do not push experiments that involve deliberate weight gain unless the client is psychologically ready and this is clinically indicated. Avoid experiments that could be physically dangerous or that the client feels coerced into.
The most powerful experiments often involve surveys of others' attitudes toward body shape/weight, which typically reveal that others are far less focused on appearance than the eating disorder predicts. Record predictions, outcomes, and what was learned from each experiment.
Suitable for clients working with eating disorder, shape, weight, cbt-e, behavioural experiment. This tool can be used as a standalone worksheet or as part of a structured homework plan.
Create a free account to access 10 professional CBT tools per month.
Track body checking and body avoidance behaviours, their triggers, and function.
Identify rigid dietary rules and design experiments to test what happens when you break them.
Explore how difficulty tolerating emotions drives eating disorder behaviours — and develop alternative ways to manage intense feelings.
Track weekly weight to observe natural fluctuation and reduce the power of daily weighing.