An evaluation of affect and binge eating.

Eugenia Gras et al. (2003) watched people who binge eat. They tracked feelings before, during, and after each binge. They also tracked feelings during normal meals for comparison.

The team used a single-case design. Each person served as their own control. This let them see if mood really changed when binges started.

Feelings got better right after a binge began. The same lift did not happen during regular meals.

This pattern fits negative reinforcement. The binge ends bad feelings, so the behavior is more likely to happen again.

Lee et al. (1997) asked for more work on why binges happen. M et al. answered by showing moment-by-moment mood data.

McMillan et al. (1999) seems to disagree. They saw bad mood drop when self-injury stopped. Yet here, bad mood drops when binge eating starts. The difference is the population. In E et al. the clients had intellectual disability; in M et al. the clients had binge-eating histories. For each group, the behavior that removes bad mood gets stronger.

Haney et al. (2023) also used negative reinforcement at mealtime. They let kids end meals right after self-feeding. Both studies show that escaping an aversive state strengthens eating behavior.

If you treat binge eating, track mood in real time. A quick lift right before or during the episode is the reinforcer. Plan ways to give that same lift without the binge. Try brief walks, music, or a short call with a friend. Teach clients to use these swaps the moment they feel the urge.