Effects of Population Compared to Purposive Sampling for Consensus in an Online Delphi Study

Study Overview
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Brief Summary
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This study will be nested as a randomized controlled trial within an online Delphi and will assess the effects of the population sampling compared to purposive sampling for consensus in an online Delphi.

Detailed Description
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The Delphi method of engaging panels of experts from specific interest areas has been widely utilized in the for the development of research reporting guidelines, core outcome sets, clinical medicine, nursing practice, medical education and healthcare services. An assessment completed by Atkins and colleagues in 2005 report that a small panel of similarly trained experts can develop reliable criteria that inform judgment and support effective decision-making. Despite the wide applicability of the Delphi methodology, it is not known how the number of participants or their similarity as a stakeholder group influences results in an online Delphi.Purposeful sampling will be used with a randomized sample taken from each stakeholder group for analysis and this analysis will be presented alongside the full analysis and the results compared. The Protocol Lab for Online Trials-Delphi (PLOT-D), which will use an online 3-round Delphi combined with participatory action research to inform the development of a multi-use protocol template for writing protocols for self-recruited online trials of interventional self-management. The Protocol lab will use the Delphi findings, along with earlier research to redesign a series of protocols for online randomized trials with the aim of providing support for citizens to work alongside researchers to build participatory health trials online.

Official Title
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Effects of Population Compared to Purposive Sampling for Consensus in an Online Delphi Study

Conditions
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Behavior, Consumer

Intervention / Treatment
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* Other: Population Sample
* Other: Purposive sample


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Protocol lab online trials Delphi (PLOT-D) Participant Exclusion Criteria: None if meets inclusion criteria

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Population sample<br> | Other: Population Sample<br>* full sample of recruited participants<br>|
| Purposive Sample<br> | Other: Purposive sample<br>* purposive sample of recruited participants<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Delphi response rate differences as measured by % of completed questions between samples | Full Delphi sample compared to a 10% randomized stratified sample taken from of the 5 stakeholder groups | Up to 20 weeks or study completion | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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decision support tools,