In February, our Ingestive Behaviour Group Seminar was given by Joke Sanders (University of Ghent) and Alice Renaud (AgroParisTech) who have been visiting the lab as research interns. They spoke about the work they have conducted during their visit, and the abstracts can be found below.
Investigation of eating behaviour in individuals with symptoms of Attention Deficit Hyperactivity Disorder (ADHD) compared to healthy controls
Evidence suggests that Attention Deficit Hyperactivity Disorder (ADHD) may be associated with eating disorders (EDs) and disordered eating behaviours, but it remains unclear which types of EDs and disordered eating behaviours may be more common in individuals with ADHD. In the present study, using a between-subjects design we investigated whether individuals with high ADHD symptoms differ to those with very low symptoms of ADHD (controls) in eating behaviour as assessed in a laboratory eating session, and whether these differences may be explained by differences in processing of food cues and interoception awareness. To assess eating behaviour, participants were offered an ad libitum lunch meal (pasta with tomato sauce) followed by a highly palatable food (cookies). Food cue processing was assessed via a behavioural task and interoception awareness via the heartbeat task. Preliminary analysis showed that although the two groups did not differ in the consumption of the pasta meal, individuals scoring high in ADHD symptoms consumed significantly more cookies than controls, suggesting that ADHD symptoms may predispose individuals in overeating behaviour, especially of highly palatable food.
The effect of modelling and serving-size labels on food intake.
A persons’ food intake is influenced by a number of factors. Previous research has shown that in social situations, people tend to adjust their food intake directly to that of their eating companion. This is called the modelling effect and it means that people tend to eat more when in the presence of a person who eats a lot than when in the presence of a person that eats only a little. Another external factor is the serving-size label on the package of the food. Studies have shown that food intake was lower when the serving-size label indicated the portion of food contained more servings (e.g. 4 servings) compared to when the label indicated it contained only a few servings (e.g. 2 servings). The current study wants to examine whether modelling or the serving-size label will have a more pronounced effect on a persons’ food intake. An experimental design with a two (remote confederate’s intake: small, large) by two (serving-size label: small, large) between-participants design is used.