Phil Jasper will be defending his Master’s Thesis titled: USING THE BITE COUNTER TO OVERCOME THE EFFECT OF PLATE SIZE ON FOOD INTAKE on Friday, May 2, 2014, in Bracket Hall, Room 419. (Contact Phil about the time).
According to a recent National Health and Nutrition Examination Survey, overweight and obesity have reached epidemic levels in the United States (Flegal et at., 2010, NHANES, 2010) There are many treatments for overweight and obesity, the most popular being behavioral interventions (Berkel et al., 2005). Self-monitoring is one of the most important factors of successful behavioral interventions (Baker & Kirschenbaum, 1993). The Bite Counter is a newly developed tool for weight loss that aids in the self-monitoring process (Dong et al., 2011). The purpose of the current study was to determine if bite count feedback and an instruction on the number of bites to take could overcome the known environmental cue of plate size where eating from larger plates causes individuals to eat more (Wansink 2004). Data were collected from 112 participants eating a meal of macaroni and cheese in a laboratory setting. In a 2×2 design, the participants were assigned to one of four conditions: instruction given and small plate, instruction given and large plate, instruction not given and small plate, or instruction not given and large plate. Grams consumed and bites taken were measured post meal as the main dependent variables. A 2×2 ANOVA of grams consumed revealed a main effect of INSTRUCTION (F(1,104)= 5.297, p=.023, η² = .048), a main effect of PLATE SIZE (F(1,104)= 5.798, p=.018, η² = .053), and an interaction (F(1,104)= 7.695, p= .007, η² = .069). A 2×2 ANOVA of bites taken revealed a main effect of INSTRUCTION (F(1,104)= 7.47, p= .007, η² = .067), a main effect of PLATE SIZE (F(1,104)= 14.264, p< .001, η² = .121), and an interaction (F(1,104)= 14.964, p< .001, η² = .126). The results suggest that a given instruction on the number of bites to take along with feedback on the number of bites taken, can partially overcome a known environmental cue of plate size.
Committee Chair: Dr. Eric Muth
Committee Members: Dr. Adam Hoover and Dr. Tom Alley.