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ERIC Number: ED318792
Record Type: Non-Journal
Publication Date: 1990-Apr
Pages: 27
Abstractor: N/A
Reference Count: N/A
High Interview Response Rates: Much Ado about Nothing?
Berdie, Doug R.
The question of how high a response rate is needed in order for telephone surveys to obtain data that accurately represent the entire sample, was investigated via reevaluating results of three previously published studies and reporting on three 1989 studies for the first time. The three previous studies indicated that, if the sample characteristics had been estimated on the basis of respondents rather than the entire sample, the conclusions would have deviated from the true sample by 4.8%, 2.1%, and 2.8%, respectively. In the first of the new studies in 1989, 811 households were telephoned to complete 700 interviews about the likelihood of purchasing savings bonds, for a response rate of 86%. In the second study in 1989, a customer satisfaction study, 149 out of 150 people responded, a rate of 99%. In the third study in 1989, 928 telephone interviews were completed out of 969 households, for a response rate of 96%. Data from all six studies indicated that response rates of at least from 65% to 75% are needed before non-response bias is reduced to a level where it is not likely to have a significant effect on decision making. The reduction in non-response error associated with increasing response rates past the 75% level will not usually justify the cost of such additional effort. Seven tables summarize data from the studies. (SLD)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A