1. Delinquent tuck shop nudge – Leon44
BE101x – edX MOOC
• Purpose: To improve snack eating habits of predelinquent boys in a South African boarding
school
• Context: Boys have excessive sugar intake,
leading to obesity, hyperactive behavior and
possibly drug interactions
• Desired behavior change: 20% decreased
consumption of candy and soda – 20% increased
consumption of dried fruit, nuts and fruit juice

2. Delinquent tuck shop nudge - 2
• Decision Making Process: four bottlenecks
identified in boys’ decision to purchase snacks
• Point of intervention at second friction point
upstream
• Current default choices, compromises,
transaction costs and decision points were
identified
• The Nudge: positioning and sizing of healthy and
unhealthy snacks to influence default choices,
transaction costs & decision points, also social
priming

3. Delinquent tuck shop nudge 3
• Experiment: Before-after, within participants,
design with control group. Random assignment of
learners to groups
• Procedure: Experimental and control groups
access tuck shops in control and nudge conditions
• Analysis: ANOVA for two significant main effects
• Expected outcome: lower consumption of
unhealthy snacks and increased consumption of
healthy snacks