Using Implementation Intentions to Self-incentivise Weight-loss

Not Applicable

Completed

• Conditions: Overweight
• Interventions: Behavioral: Self-generated self-incentivising implementation intentions; Behavioral: Multiple self-incentivising implementation intentions; Behavioral: Single self-incentivising implementation intention

• Registration Number: NCT03522727
• Lead Sponsor: University of Manchester

Brief Summary

The aim of the present research is to test the effect of helping people to reward themselves when they have successfully lost weight and the impact this will have on subsequent weight. Each participant will be randomly allocated to one of four conditions. The trial requires 200 participants to perform a fully powered statistical analysis. The four conditions are: (1) a control condition, (2) intervention 1 (form a single self-incentivising implementation intention from a drop-down menu), (3) intervention 2 (form multiple self-incentivising implementation intentions from a drop-down menu), or (4) intervention 3 (asked to form a single self-incentivising implementation intention of their own devising). The main outcome measure will be BMI, which will be self-reported.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2018-05-01
• Study First Submitted QC: 2018-05-01
• Study Start: 2018-05-04
• Study First Posted: 2018-05-11
• Primary Completion: 2018-07-25
• Study Completion: 2018-08-31
• Status Verified: 2018-10
• Last Update Submitted: 2018-10-19
• Last Update Posted: 2018-10-23

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 79

Inclusion Criteria

• Aged 18+

Exclusion Criteria

• Unable or unwilling to complete questionnaire

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention 3	Self-generated self-incentivising implementation intentions	Self-generated self-incentivising implementation intentions After completing a questionnaire, participants will be asked to form a self-incentivising implementation intention: Research shows that rewarding yourself for success can help you to lose weight, but that people often forget to reward themselves. We want you to plan to reward yourself if you achieve your personal weight-loss goal, at the end of 4 weeks. To help you do this, we would like you to complete the following sentence by telling us how you will reward yourself. Please complete the following sentence with a reward of your own choosing. If I lose at least ___lbs/kg by the end of 4 weeks, then I will reward myself by...
Intervention 2	Multiple self-incentivising implementation intentions	Multiple self-incentivising implementation intentions After completing a questionnaire, participants will be asked to form self-incentivising implementation intentions: Research shows that rewarding yourself for success can help you to lose weight, but that people often forget to reward themselves. We want you to plan to reward yourself if you achieve your personal weight-loss goal, at the end of 4 weeks. To help you do this, we would like you to complete the following sentence by telling us how you will reward yourself. You can choose as many rewards as you like! Please complete the following sentence with a reward of your own choosing. If I lose at least ___lbs/kg by the end of 4 weeks, then I will reward myself by... and/or... \*\*Drop down menu\*\* Learning a new skill...
Intervention 1	Single self-incentivising implementation intention	Single self-incentivising implementation intention After completing a questionnaire, participants will be asked to form a self-incentivising implementation intention: Research shows that rewarding yourself for success can help you to lose weight, but that people often forget to reward themselves. We want you to plan to reward yourself if you achieve your personal weight-loss goal, at the end of 4 weeks. To help you do this, we would like you to complete the following sentence by telling us how you will reward yourself. Please complete the following sentence with a reward of your own choosing. If I lose at least ___lbs/kg by the end of 4 weeks, then I will reward myself by... \*\*Drop down menu\*\* Learning a new skill...

Primary Outcome Measures

Name	Time	Method
Actual Use of Self-Rewards	4 weeks	Self-reported
Body Mass Index	4 weeks	Self-reported

Secondary Outcome Measures

Name	Time	Method
Capabilities, opportunities and motivations	4 weeks	Self-reported

Trial Locations

Locations (2)

Online study; 🇬🇧 Manchester, United Kingdom

University of Manchester; 🇬🇧 Manchester, United Kingdom