Using fMRI, this study will explore the neural correlates of satiety when individuals make decisions about food. The investigators will also examine individual differences in satiety effects.

Inclusion Criteria:

• Chinese ethnicity
• 21 to 45 years old
• English as first language
• Right-handed
• Have normal eyesight, or have long-sightedness or myopia within +8.0 to -8.0 diopters (unless corrected by contact lenses)
• Weigh less than 100kg with an abdominal circumference of less than 120cm
• Non-smoker, or only smoke occasionally (less than 5 sticks a week)
• Consume less than 2 units (200 mg) of caffeine a day
• Consume less than 21 units of alcohol per week (e.g. 500ml 5% beer = 2.5 units, 250ml 14% wine = 3.5 unit)
• Habitually sleep before 1am and wake before 9am

Exclusion Criteria:

• On a restrictive diet (e.g., vegetarian/vegan diet)
• History of food allergies
• History of psychiatric or neurological disorders
• History of chronic medical illness
• Metal implants in or on the body (e.g. braces, dental retainers, pacemakers)
• Shift worker
• Claustrophobic
• High astigmatism (high = >2.00 diopters)
• Colour-blind

Community sample