The Delphi method was developed in the 1950’s with the aim of gathering opinions and feedback to reach consensus on a research topic. This research technique best fits research topics where future predictions or forecasting is required. It aims at collecting expert knowledge and thoughts from subject matter experts in a
The main different between the two research methods is that the NGT can generate results and consensus with a short time period such as an hour or two hours whereas the Delphi technique can take days to solicit input and ideas of participants. And because of this time frame difference, the NGT can be used as an effective real time research tool to determine a future trend or prediction within a short time frame whereas the Delphi technique needs much more time to gather the opinions and feedback of experts of pressing research issues and use that knowledge to make decisions about future trends and forecasts.
One force that could affect the success of those methods is the ethical aspect of group participation. How sincere are the participants when they provide input and feedback can impact the quality of the results obtained from either technique. The other force is the technology force; which technology do we use to gather expert opinion of research topics. Are we using surveys, face-to-face interviews of e-mail communication to communicate with participants? If we use face to face interviews, then we may get more candid answers and solutions of the underlying research issues.
references
http://www.stfm.org/fmhub/fm2004/June/Alison402.pdf
VargaAtkins,T;withBunyan,N.;McIsaac,J;Fewtrell,R(2011)Usingthenominalgrouptechniquewithclickerstoresearchstudentexperiencesofe learning:aprojectreport.WrittenfortheELESIGSmallGrantsScheme.Liverpool:UniversityofLiverpoo