Satiety Effects on the Neural Valuation of Food

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