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Take it slow: Examining the efficacy of persuasive technology to alter eating rate


- candidate number22241
- NTR NumberNTR5237
- ISRCTNISRCTN no longer applicable
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR28-mei-2015
- Secondary IDs057-14-010 / 2015/00386/NIHC NWO: Food Cognition & Behaviour
- Public TitleTake it slow: Examining the efficacy of persuasive technology to alter eating rate
- Scientific TitleTake it Slow: Feedback, Persuasive Technology and Reducing Eating Rates
- ACRONYM
- hypothesisOver 41% of the Dutch population is overweight, a known risk factor for a range of debilitating conditions. Modifying behaviours associated with overweight, such as eating rate, or the speed at which people consume food, could reduce overweight and improve health. Eating rate is a basic determinant of appetite regulation, as people who eat more slowly feel sated earlier and eat less. Unfortunately without assistance, eating rate is difficult to modify due to its highly automatic nature. The current study examines whether real-time vibrotactile feedback about eating rate delivered by a persuasive technology can alter eating behaviour in the lab.
- Healt Condition(s) or Problem(s) studiedEating behaviour, Food intake
- Inclusion criteriaBoth males and females, between 18 and 65 years old, fast eaters, BMI 18 > and < 35
- Exclusion criteria< 18 years, BMI < 18 and > 35
- mec approval receivedyes
- multicenter trialno
- randomisedyes
- masking/blindingNone
- controlActive
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 13-mei-2015
- planned closingdate1-jan-2016
- Target number of participants128
- InterventionsWe test the effect of vibrotactile feedback on eating rate. More specifically, we examine whether vibrotactile feedback delivered through the augmented fork decelerates eating rate during a single meal consumed in a controlled laboratory setting. We employ an experimental between-participants design with two conditions. Depending on condition, participants will eat a meal using the augmented fork with vibrotactile feedback (experimental condition) or using the same fork without feedback (control condition). In the experimental condition, the fork alerts participants with the help of gentle vibrations when they are eating too fast. In the control condition, participants will use the same fork but will not be given any feedback on their eating rate. Participants will eat their meal alone in order to exclude potential social influence effects on intake or eating rate. Further, to rule out demand characteristics, participants in both conditions will be told that the fork will track their eating rate and that slow eating rate is beneficial for their health. In addition, in the experimental condition participants will be told that the fork will vibrate when they are eating too fast. Each participant will be served a standardized amount of a pasta dish (800g), from which they can help themselves. Each session will last approximately 45 minutes.
- Primary outcome- Total amount consumed (in grams)
- Average eating speed (number of servings per minute)
- Over speed ratio
- Secondary outcome- average meal duration
- average interval between servings
- Total fork servings
- Satiety

Furthermore, potential confounding variables such as palatability, mood, time of day, and meal enjoyment will be assessed. Finally, the DEBQ (Dutch eating behaviour questionnaire) will be assessed.
- TimepointsAll primary outcomes will be measured at one time point, during/ after the meal. On weekdays between 11.30 and 15.00h.

Secondary outcomes will also be measured at one time point. Except for satiey, this will be measure on 2 timepoints (before and after the meal).
- Trial web site
- statusinclusion stopped: follow-up
- CONTACT FOR PUBLIC QUERIESDr. Roel Hermans
- CONTACT for SCIENTIFIC QUERIESDr. Roel Hermans
- Sponsor/Initiator Radboud University Nijmegen, Behavioural Science Institute, Radboud University Nijmegen
- Funding
(Source(s) of Monetary or Material Support)
NWO, SlowControl
- PublicationsNog niet van toepassing
- Brief summaryThis study tests the effect of vibrotactile feedback on eating rate. More specifically, we examine whether vibrotactile feedback delivered through the augmented fork decelerates eating rate during a single meal consumed in a controlled laboratory setting. We employ an experimental between-participants design with two conditions. Depending on condition, participants will eat a meal using the augmented fork with vibrotactile feedback (experimental condition) or using the same fork without feedback (control condition). We will test whether people in the experimental condition eat less / slower than those in the control condition.
- Main changes (audit trail)
- RECORD28-mei-2015 - 3-jan-2017


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