The No Significant Difference Phenomenon
This website has been designed to serve as a companion piece to Thomas L. Russell's book, "The No Significant Difference Phenomenon" (2001, IDECC, fifth edition). Mr. Russell's book is a fully indexed, comprehensive research bibliography of 355 research reports, summaries and papers that document no significant differences (NSD) in student outcomes between alternate modes of education delivery, with a foreword by Dr. Richard E. Clark. Previous editions of the book were provided electronically; the fifth edition is the first to be made available in print from IDECC (The International Distance Education Certification Center).
The primary purpose of the NSD website is to expand on the offerings from the book by providing access to appropriate studies published or discovered after the release of the book. In addition to studies that document no significant difference (NSD), the website includes studies which do document significant differences (SD) in student outcomes based on the mode of education delivery.