Anastasi, A. (1982). Psychological testing (5th ed.). New York: Macmillan.
2.
Babbie, E. R. (1973). Survey research methods. Belmont, CA: Wadsworth.
3.
Brod, M. S. , & Feinbloom, R. I. (1990). Feasibility and efficacy of verbal consents. Research on Aging, 12(3), 364-372.
4.
Cochran, W. (1963). Sampling techniques (2nd ed.). New York: Wiley.
5.
Cochran, W. , Mosteller, F., & Tukey, J. (1953). Statistical problems of the Kinsey report. Journal of the American Statistical Association, 48, 673-716.
6.
Cohen, J. (1960). A coefficient of agreement for nominal scales. Educational and Psychological Measurement, 20, 37-46.
7.
Condon, J. T. (1986). The "unresearched"-those who decline to participate. Australian and New Zealand Journal of Psychiatry, 20, 87-89.
8.
Cook, T. D. , & Campbell, D. T. (1976). Quasi-experimentation, design and analysis issues for field settings. Chicago: Rand McNally.
9.
Dillman, D. (1978). Mail and telephone surveys: The total design method. New York: Wiley.
10.
Douglas, S. , & Larson, E. (1986). There's more to informed consent than information. Focus on Critical Care, 13, 43-47.
11.
Epstein, L. , & Lasagna, L. (1969). Obtaining informed consent: Form or substance. Archives of Intemal Medicine, 123, 682-688.
12.
Hansen, M. , & Hurwitz, W. (1946). The problem of non-response in sample surveys. Journal of the American Statistical Association, 41, 517-529.
13.
Heberlein, T. , & Baumgartner, R. (1978). Factors affecting response rates to mailed questionnaires: A quantitative analysis of the published literature. American Sociological Review, 43, 447-462.
14.
Howard, K. , Krause, M., & Orlinsky, D. (1986). The attrition dilemma: Toward a new strategy for psychotherapy research. Journal of Consulting and Clinical Psychology, 54, 106-110.
15.
Kanuk, L. , & Berenson, C. (1975). Mail surveys and response rates: A literature review. Journal of Marketing Research, 12, 440-453.
16.
Rosenthal, R. , & Rosnow, R. L. (1975). The volunteer subject. New York: Wiley.
17.
Sewell, W. , & Hauser, R. (1975). Education, occupation and earnings: Achievement in the early career. New York: Academic Press.
18.
Sudman, S. , & Bradburn, N. (1974). Response effects in surveys. Chicago: Aldine.
19.
Woollett, A. , White, D., & Lyon, M. (1982). Studies involving fathers: Subject refusal, attrition, and sampling bias. Current Psychological Review, 2, 193-212.
