Participants will complete active implicit priming, in which food images are implicitly primed (i.e., below conscious awareness) with images of positive or negative affect. This will be completed on a weekly basis for 12 weeks, for approximately 10 minutes each time.

Participants will complete control implicit priming, which matches the active intervention, but with neutral stimuli as primes. This will be completed on a weekly basis for 12 weeks, for approximately 10 minutes each time.

Participants will complete a Food Exposure Task, in which they will be asked to smell, feel, lick, and imagine eating food items, but without actually eating them. This will be completed on a weekly basis for 12 weeks, for approximately 10-30 minutes each time.

Approximately 10-minute behavioral intervention

Percent change in blood oxygen level dependent (BOLD) response from baseline to after the 12-week intervention while viewing visual food cues will be measured using functional magnetic resonance imaging (fMRI), focusing on insula, striatum, and prefrontal cortex.

Food image ratings change from baseline to after the 12-week intervention. Food images are rated on "desire to eat" by visual analogue scale (0-100), with higher scores indicating greater desire to eat.

Food intake change from baseline to after the 12-week intervention. Food intake will be measured as total calories consumed during an ad libitum meal.

Percent change in body weight (kg) from baseline to after the 12-week intervention.

Change in fat mass, as measured using dual-energy x-ray absorptiometry, from baseline to after the 12-week intervention.