search query: @author Sykes, W. / total: 5
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2.
Validity and reliability in qualitative market research: a review of the literature
Journal of the Market Research Society
1990 : JUL, VOL. 32:3, p. 289-328
 1990 Sykes, W.
3.
Validity and reliability in qualitative market research: a review of the literature.
Journal of the Market Research Society
1990 : JUL, VOL 32:3, p.289-328
 1990 Sykes, W.
4.
Evaluating survey questions.
Journal of Official Statistics
1987 : VOL. 3:2, p. 191-207
 1987 Sykes, W.
Morton-Williams, J.
5.
The use of interaction coding and follow-up interviews to investigate comprehension of survey questions.
Journal of the Market Research Society
1984 : APR, VOL. 26:2, p. 109-127
 1984 Morton-Williams, J.
Sykes, W.
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