Time line of experimental procedures in Experiment 1, Experiment 2, and Experiment 3. Boxes show each procedure and times above arrows the intervals between them. See text for details of procedures in each box. ‘Questionnaire’ refers to the ratings that the participants completed in all experiments. Ratings included hunger, fullness, taste intensity, sweetness, liking and the extent of enjoying the consumption. CR = continuous reinforcement schedule (ad libitum intake), PR = progressive ratio schedule.