ClinicalTrials.gg
WithdrawnNCT03314415Updated Nov 7, 2018

Pilot Study on Weight Loss With Robotic Assistance

An interventional study of Aldebaraan Nao H25 in Overweight and Obesity and Weight Loss, sponsored by Tufts University. Withdrawn at 1 site in United States. Open to participants aged 25 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-11-07.

Primary conditionObesityRegistry: OverweightReclassifiedWhy we changed it
Registry
Overweight — the first condition term the registry derived for this study.
ClinicalTrials.gg
Obesity
Why
  1. The study's listed conditions name Obesity, a narrower term within Overweight.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Tufts University · Not applicable, Interventional, and Treatment

Why this study was withdrawn
Study will not be implemented and did not enroll participants.
Phase
Not applicable
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
25 Years to 65 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 22 studies in Obesity by Tufts University — 5 open to participants now, 6 under way, none of them phase 3. Obesity · Tufts University.

Enrollment
17th of 18
0 · median 86
Started
2018
the only one that year
No phase
18 of 22
4 open now
Registered
13th of 22
by date

Among the 22 studies in Obesity by Tufts University, this one is the 17th largest by enrollment of the 18 interventional ones that give a count, is the only one that started in 2018, is one of 18 with no phase, and was the 13th registered.

Obesity

11,522 studies on the registry are indexed under Obesity; 2,033 are open to participants now.

Browse Obesity studies →

Open to participants now

5 of the 22 studies in Obesity by Tufts University are open now, in 1 country. Recruiting first, the newest first:

By country, each count listing its studies:

All 5 open studies →

Where they have run

Who these studies take

Of the 1,336 Obesity studies recruiting now, 377 (28%) set no upper age limit and 856 (64%) stop at 75 or younger; 168 take children under 18; 491 take healthy volunteers.

This study: 25 Years to 65 Years · all sexes · healthy volunteers too.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 22 studies in Obesity by Tufts University, or all of them as a file.
02

Study summary

The purpose of this study is to determine whether robotic assistance can help facilitate adherence, engagement, and weight loss in participants enrolled in a behavioral weight loss program. All participants will be enrolled in the same Web-based weight loss program and take part in "robotic assistance sessions" either early or late in the five-week study. These robotic assistance sessions involve speaking one on one with a robot about diet-related progress.

Read the detailed description

At the start of the five-week study, all participants will be enrolled in a Web-based behavioral weight loss program. The weight loss program places particular emphasis on hunger reduction and craving control for both weight loss and prevention of weight regain. The program will consist of six videoconference sessions delivered by a qualified coach. Menus and other program materials will be available to the participants throughout the study period.

Participants also will be assigned to attend one-on-one "robotic assistance sessions" either early or late in the five-week study. During each robotic assistance session, the participant will speak with the robot about his/her progress with the weight loss program. The robot is programmed to respond to specific issues raised by the participant, but a human operator with thorough knowledge of the weight loss program will be available in case the conversation goes "off script." This human operator can initiate robot behaviors and prompt verbal responses through a text-to-speech interface.

Data from this study will be used to refine the robot for future use and determine whether robotic help can improve a participant's experience in a previously tested weight loss program.

03

Conditions studied

  • Overweight and Obesity
  • Weight Loss

Browse trials for

Keywords

  • overweight
  • obesity
  • weight loss
  • robot
04

In context

Obesity Reclassified

11,522 studies on the registry are indexed under Obesity; 2,033 are open to participants now.

Browse Obesity studies →

Lead sponsor

Tufts University is the lead sponsor of 228 studies on the registry; 23 are open to participants now.

Of its 11 completed or terminated interventional studies of FDA-regulated products, 8 (73%) have results posted.

Compared within Obesity, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Overweight. The counts are of registry records indexed under each term, refreshed daily. How we classify →

05

Who can participate

Ages eligible
25 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Men and women who are overweight or obese ( of 25-40 kg/m2)
  • Want to lose weight and enroll in the study, and are willing to sign the form
  • Able to meet the study requirements for food habits and able to attend online videoconference sessions
  • Willing and able to attend in-person robotic assistance sessions, and are not planning to be out of town for more than five days during the study

Exclusion criteria

Exclusion Criteria:

  • Self-reported serious food allergies/intolerances, dietary patterns, or active health conditions (e.g., irritable bowel syndrome, Crohn's disease, celiac disease) that would prevent consumption of recommended foods.
  • Concurrent participation in another weight loss program or >2 hours/day of exercise on average.
  • Actively dieting or self-reported weight loss of >10 lb in the past 3 months
  • Vulnerable populations, including women who are pregnant and adults who are unable to consent
  • Women who are lactating or planning to become pregnant within two months of the start date, per self-report
  • Diagnosis of a serious mental health condition
  • Non-English speaking individuals
  • Medical complications or chronic illness that would prevent full participation (e.g., active cancer)
  • Surgical procedures that influence hunger or satiety (e.g., gastric bypass, bowel rerouting, stomach sleeve)
  • Primary training as a Clinical Nutritionist or practicing Registered Dietitian
  • Diagnosed eating disorder
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

06

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    Early robotic intervention

    Participants randomized to the early robotic intervention will attend robotic assistance sessions for a two-week period earlier in the study (during the first half of the study, approximately). Each participant will attend ten 15-minute robotic assistance sessions to interact with a robot (Aldebaraan Nao H25).

    Device: Aldebaraan Nao H25

  • Experimental
    Late robotic intervention

    Participants randomized to the late robotic intervention will attend robotic assistance sessions for a two-week period later in the study (during the latter half of the study, approximately). Each participant will attend ten 15-minute robotic assistance sessions to interact with a robot (Aldebaraan Nao H25).

    Device: Aldebaraan Nao H25

Interventions

  • DeviceAldebaraan Nao H25

    The Aldebaraan Nao H25 is a humanoid robot with the capability to interact with people through small movements, gestures, and speech. It does not physically touch the participant at any time.

07

What researchers measure

Primary outcomes

  1. Weight change

    Primary outcome is weight change during the with-robot and without-robot periods adjusted for week of weight loss.

    Time frame: 5 weeks

Secondary outcomes

  1. Change in self-reported eating behavior

    Participants will complete the Three-Factor Eating Questionnaire, consisting of 18 items, which will be used to assess eating behavior on a 4-point response scale (4=definitely true;3=mostly true;2=mostly false;1=definitely false). Responses to each of the 18 items are given a score between 1 and 4 and item scores are summed into scale scores for cognitive restraint, uncontrolled eating, and emotional eating. Total scores will be reported and higher scores in the respective scales are indicative of greater cognitive restraint, uncontrolled, or emotional eating. Questionnaires are self-administered.

    Time frame: Baseline, once during with-robot phase, Week 5

  2. Change in self-reported food cravings

    Participants will complete the Food Cravings Questionnaire - Trait, which will be used to assess food cravings on a 6-point response scale (1=Never or NA;2=Rarely; 3=Sometimes;4=Often;5=Usually;6=Always). Responses to each of the 39 items are given a score between 1 and 6 and item scores are summed into scale scores with higher scores being indicative of greater eating pathology, body mass index (BMI), low dieting success and increases in state food craving during cognitive tasks. Total scores will be reported. Questionnaires are self-administered.

    Time frame: Baseline, once during with-robot phase, Week 5

  3. Self-reported quality of life

    Participants will complete the RAND 36-Item Short Form Survey, which will be used to assess eight health concepts: physical functioning, bodily pain, role limitations due to physical health problems, role limitations due to personal or emotional problems, emotional well-being, social functioning, energy/fatigue, and general health perceptions. All items are scored so that a high score defines a more favorable health state. In addition, each item is scored on a 0 to 100 range so that the lowest and highest possible scores are 0 and 100, respectively. Scores represent the percentage of total possible score achieved. Items in the same scale are averaged together to create the 8 scale scores. Scale scores represent the average for all items in the scale that the respondent answered.

    Time frame: Baseline, once during with-robot phase, Week 5

  4. Participant engagement with the robot

    Visual analog scales, measured by the robot, will be analyzed to evaluate participant engagement during each of the ten 15-minute robotic assistance sessions that will occur over the course of two weeks.

    Time frame: 2 weeks

  5. Robot adherence

    Robot adherence will be measured based upon attendance to the robotic assistance sessions. Each participant will be scheduled to attend ten robotic assistance sessions.

    Time frame: 2 weeks

  6. Dietary intake

    Dietary intake will be determined by two 24-hour diet recalls. One 24-hour recall will occur during the with-robot phase and the other will occur during the without-robot phase.

    Time frame: Two 24-hour periods

  7. Program adherence

    Adherence to the iDiet will be measured by the number videoconference sessions attended by the participant. Each participant will be scheduled to participate in six videoconference sessions (one/week), each one hour long.

    Time frame: 5 weeks

08

Study locations

1 site
  • Tufts University
    Boston, Massachusetts 02111, United States
09

References and documents

Publications

  • Salinardi TC, Batra P, Roberts SB, Urban LE, Robinson LM, Pittas AG, Lichtenstein AH, Deckersbach T, Saltzman E, Das SK. Lifestyle intervention reduces body weight and improves cardiometabolic risk factors in worksites. Am J Clin Nutr. 2013 Apr;97(4):667-76. doi: 10.3945/ajcn.112.046995. Epub 2013 Feb 20. PubMed 23426035 ↗
  • Briggs P, Scheutz M, Tickle-Degnen L, editors. Are Robots Ready for Administering Health Status Surveys': First Results from an HRI Study with Subjects with Parkinson's Disease. Proceedings of the Tenth Annual ACM/IEEE International Conference on Human-Robot Interaction; 2015: ACM.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Oct 2018; primary completion for Nov 2018, 1 month later.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 17, 2017
First posted
Oct 19, 2017
StartEst.
Oct 11, 2018
Primary completionEst.
Nov 30, 2018
CompletionEst.
Nov 30, 2018
Last update
Nov 7, 2018
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 7, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03314415
Lead sponsor
Tufts University
Responsible party
Susan Roberts (Director and Senior Scientist, Tufts University) — Principal investigator
First posted
Oct 19, 2017
Start date
Oct 11, 2018 (estimated)
Primary completion
Nov 30, 2018 (estimated)
Completion
Nov 30, 2018 (estimated)
Last update
Nov 7, 2018

Study contacts

Susan B Roberts, PhD
principal investigator · Tufts University Jean Mayer USDA Human Nutrition Research Center on Aging

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in Nov 2018. You cannot join it, but the record below documents what was studied.

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