(P.S.: Review this and all STEPPE/Hedbring reference lists often; they are in constant flux as new literature is uncovered, recommended, or encountered. We are all in this together, so please be quick and eager to point out errors or additional literature you find compelling. Thank you.)

Abelson, R.P. (1995). Statistics as principled argument. Hillsdale, NJ: Erlbaum.

Airasian, P., & Madaus, G. (1983). Linking, testing and instruction: Policy issues. Journal of Educational Measurement, 20, 103-118.

Algozzine, B. (1978). A statistical interpretation primer for the practitioner (test of means). Exceptional Children, 45, 94-98.

American Psychiatric Association. (1987). Diagnostic and statistical manual of mental disorders (3rd ed., rev.) (DSM-III-R). Washington, DC: Author.

American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: Author.

Anderson, N.H. (1961). Scales and statistics: Parametric and nonparametric. Psychological Bulletin, 58, 305-316.

Angoff, W.H. (1988). Proposals for theoretical and applied development in measurement. Applied Measurement in Education, 1, 215-222.

Barrett, B.H., Johnston, J.M., & Pennypacker, H.S. (1986). Behavior: Its units, dimensions, and measurement. In R.O. Nelson & S.C. Hayes (Eds.), Conceptual foundations of behavioral assessment (pp. 156-200). New York: Guilford.

Bennett, R.E., Rock, D.A., & Wang, M. (1991). Equivalence of free-response and multiple-choice items. Journal of Educational Measurement, 28, 77-92.

Berk, R.A. (1979). Generalizability of behavioral observations: A clarification of interobserver agreement and interobserver reliability. Journal of Mental Deficiency, 83, 460-472.

Berk, R.A. (1980). Criterion-referenced measurement: The state of the art. Baltimore: The Johns Hopkins University Press.

Beyer, W.H. (1966). Handbook of tables for probability and statistics. Cleveland, OH: The Chemical Rubber Company.

Bickel, P.J., & Lehmann, E.L. (1975). Descriptive statistics for nonparametric models. II. Location. Annals of Statistics, 3, 1045-1069.

Bickel, P.J., & Lehmann, E.L. (1976). Descriptive statistics for nonparametric models. III. Dispersion. Annals of Statistics, 43, 1139-1158.

Bock, R.D. (1975). Multivariate statistical methods in behavioral research. New York: McGraw-Hill.

Bolton, B. (Ed.). (1987). Handbook of measurement and evaluation in rehabilitation. Baltimore: Brookes.

Boring, E.G. (1920). The logic of the normal law of error in mental measurement. American Journal of Psychology, 31, 1-33.

Bracht, G.H., & Glass, G.V. (1968). The external validity of experiments. American Education Research Journal, 5, 437-474.

Bradley, J.W. (1977). A common situation conducive to bizarre distribution shapes. The American Statistician, 31, 147-150.

Brant, R. (1990). Comparing classical and resistant outlier rules. Journal of the American Statistical Association, 85, 1083-1090.

Brinberg, D., & McGrath, J.E. (1985). Validity and the research process. Newbury Park, CA: Sage.

Buros, O.K. (1968). The story behind the Mental Measurements Yearbooks. Measurement and Evaluation in Guidance, 1, 86-95.

Buros, O.K. (1978). The Eighth Mental Measurements Yearbook. Highland Park, IL: Gryphon.

Campbell, D., & Campbell, M. (1995). The student's guide to doing research on the internet. Reading, MA: Addison-Wesley.

Campbell, D.T. (1957). Factors relevant to the validity of experiments in social settings. Psychological Bulletin, 54, 297-312.

Campbell, D.T. (1960). Blind variation and selective retention in creative thought as in other knowledge processes. Psychological Review, 67, 380-400.

Campbell, D.T. (1963). From description to experimentation: Interpreting trends as quasi-experiments. In C.W. Harris (Ed.), Problems in measuring change (pp. 212-242). Madison, WI: University of Wisconsin Press.

Campbell, D.T. (1969). Reforms as experiments. American Psychologist, 24, 409- 429.

Campbell, D.T. (1970). Considering the case against experimental evaluations of social innovations. Administrative Science Quarterly, 15, 110-113.

Campbell, D.T. (1975). "Degrees of freedom" and the case study. Comparative Political Studies, 8, 178-193.

Campbell, D.T. (1988). Methodology and epistemology for social science: Selected papers. Chicago: University of Chicago Press.

Campbell, D.T., & Stanley, J.C. (1963). Experimental and quasi-experimental designs for research on teaching. In N.L. Gage (Ed.), Handbook of Research on Teaching (pp. 171-246). Chicago: Rand McNally. (Also published in 1966 as Experimental and Quasi-experimental designs for research. Chicago: Rand McNally.)

Carver, R.P. (1978). The case against statistical significance testing. Harvard Educational Review, 48, 378-399.

Cheng, B. & Titterington, D. M. (1994). Neural networks: A review from a statistical perspective. Statistical Sciences, 9(1), 2-54.

Cherkassky, V., Friedman, J.H., & Wescheler, H. (Eds.). (1994). From statistics to neural networks: Theory and pattern recognition applications. New York: Springer-Verlag.

Cliff, N. (1993). Dominance statistics: Ordinal analyses to answer ordinal questions. Psychological Bulletin, 114, 494-509.

Cohen, J. (1960). A coefficient of agreement for nominal scales. Educational and Psychological Measurement, 20, 37-46.

Cohen, J. (1962). The statistical power of abnormal-social psychological research: A review. Journal of Abnormal and Social Psychology, 65, 145-153.

Cohen, J. (1969). Statistical power analysis for the social sciences. New York: Academic Press.

Cohen, J. (1977). Statistical power analysis for the behavioral sciences. New York: Academic Press.

Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Erlbaum.

Conoley, J., & Kramer, J. (Eds.). (1989). The tenth mental measurements yearbook. Lincoln, NE: The University of Nebraska Press.

Cooper, J.O. (1974). Measurement and analysis of behavioral techniques. Columbus, OH: Charles E. Merrill.

Cooper, J.O., & Johnson, J. (1979). Guideline for direct and continuous measurement of academic behavior. The Directive Teacher, 1(3), 10-12.

Cronbach, L.J. (1957). The two disciplines of scientific psychology. American Psychologist, 12, 671-684.

Cronbach, L.J. (1975). Beyond the two disciplines of scientific psychology. American Psychologist, 30, 116-136.

Cronbach, L.J. (1975). Five decades of public controversy over mental testing. American Psychologist, 30, 1-14.

Cronbach, L.J. (1982). Designing evaluations of educational and social programs. San Francisco: Jossey-Bass.

Cronbach, L.J. (1988). Five perspectives on the validity argument. In H. Waner & H.I. Braun (Eds.), Test validity (pp. 3-17). Hillsdale, NJ: Erlbaum.

Cronbach, L.J. (1990). Essentials of psychological testing (5th ed.). New York: Harper & Row.

Cronbach, L.J., & Furby, L. (1970). How we should measure "change"--or should we? Psychological Bulletin, 74, 68-80.

Cronbach, L.J., & Meehl, P.E. (1955). Construct validity in psychological tests. Psychological Bulletin, 52, 281-302.

Cronbach, L.J., & Shapiro, K. (1982). The limited research of internal validity. In L.J. Cronbach & K. Shapiro (Eds.), Designing evaluations of educational and social programs (pp. 112-157). San Francisco: Jossey-Bass.

Cronbach, L.J., & Snow, R.E. (1977). Aptitudes and instructional methods: A handbook on research for interactions. New York: Irvington Press.

Cronbach, L.J., & Snow, R.E. (1977). Interaction of abilities with variations in instructional programming. In L.J. Cronbach & R.E. Snow, Aptitudes and instructional methods: A handbook for research on interactions (pp. 175-215). New York: Irvington Press.

Cronbach, L.J., & Snow, R.E. (1977). Interaction of abilities with variations in curriculum and instruction. In L.J. Cronbach & R.E. Snow, Aptitudes and instructional methods: A handbook for research on interactions (pp. 295-340). New York: Irvington Press.

Cronbach, L.J., & Snow, R.E. (1977). Cognitive skills, structures, and styles. In L.J. Cronbach & R.E. Snow, Aptitudes and instructional methods: A handbook for research on interactions (pp. 341-391). New York: Irvington Press.

Cronbach, L.J., & Snow, R.E. (1977). What do we know about ATI? What should we learn? In L.J. Cronbach & R.E. Snow, Aptitudes and instructional methods: A handbook for research on interactions (pp. 492-522). New York: Irvington Press.

Davies, L., & Gather, U. (1993). The identification of multiple outliers. Journal of the American Statistical Association, 88, 782-792.

Dixon, W.J., Brown, M.B., Engelman, L., & Jenrich, R.I. (Eds.). (1990). BMDP statistical software manual (Vol. 1). Berkeley, CA: University of California Press.

Draper, D. (1995). Inference and hierarchical modeling in the social sciences. Journal of Educational and Behavioral Statistics, 20, 115-147.

Ebel, R.L. (1972). Essentials of educational measurement. Englewood Cliffs, NJ: Prentice-Hall.

Eisenhart, M., & Howe, K. (1992). Validity in educational research. In M.D. LeCompte, W.L. Millroy, & J. Preissle (Eds.), The handbook of qualitative research in education (pp. 643-680). New York: Academic Press.

Eisner, E.W. (1981). On the differences between scientific and artistic approaches to qualitative research. Educational Researcher, 10, 5-9.

Eisner, E.W. (1984). Can educational research inform educational practice? Phi Delta Kappan, 65, 447-452.

Frick, T., & Semmel, M.I. (1978). Observer agreement and reliabilities of classroom observational measures. Review of Educational Research, 48, 157-184.

Fuchs, L.S., & Deno, S.L. (1992). Paradigmatic distinctions between instructionally relevant measurement models. Exceptional Children, 57, 488-501.

Gentry, D., & Haring, N. (1976). Essentials of performance measurement. In N. Haring & L. Brown (Eds.), Teaching the severely handicapped (Vol. 1, pp. 209- 236). New York: Grune & Stratton.

Gitomer, D.H. (1993). Performance assessment and educational measurement. In R. E. Bennett & W.C. Ward (Eds.), Construction versus choice in cognitive measurement (pp. 241-263). Hillsdale, NJ: Erlbaum.

Glaser, R. (1963). Instructional technology and the measurement of learning outcomes: Some questions. American Psychologist, 18, 519-521.

Glaser, R., Lesgold, A., & Lajoie, S. (1985). Toward a cognitive theory for the measurement of achievement. In R.R. Ronning, J. Glover, J.C. Conoley, & J.C. Witt (Eds.), The influence of cognitive psychology on testing and measurement (pp. 41-85). Hillsdale, NJ: Erlbaum.

Glass, G.V. (1978). Standards and criteria. Journal of Educational Measurement, 15, 237-261.

Glass, G.V., & Hopkins, D.D. (1984). Statistical methods in education and psychology (2nd ed.). Englewood Cliffs, NJ: Prentice-Hall.

Green, B.F. (1988). Critical problems in computer-based psychological measurement. Applied Measurement in Education, 1, 223-231.

Green, B.F. (1987). Construct validity of computer-based tests. In H. Wainer & H.I. Braun (Eds.), Test validity (pp. 77-86). Hillsdale, NJ: Lawrence Erlbaum.

Gronlund, N.E. (1985). Measurement and evaluation in teaching (5th ed.). New York: Macmillan.

Haertel, E. (1985). Construct validity and criterion-referenced testing. Review of Educational Research, 55, 23-46.

Hambleton, R.K., Swaminathan, H., Algina, J., & Coulson, D.B. (1978). Criterion- referenced testing and measurement: A review of technical issues and developments. Review of Educational Research, 48, 1-47.

Hartmann, D.P. (1977). Considerations in the choice of interobserver reliability estimates. Journal of Applied Behavior Analysis, 10, 103-116.

Hedges, L.V., & Olkin, I. (1985). Statistical methods for meta-analysis. New York: Academic Press.

Hinkle, D.E., Wiersma, W., & Jurs, S.G. (1979). Applied statistics for the behavioral sciences. Chicago: Rand McNally.

Hoge, R.D. (1985). The validity of direct observation measure of pupil classroom behavior. Review of Educational Research, 55, 469-483.

Hopkins, B.L., & Hermann, J.A. (1977). Evaluating interobserver reliability of interval data. Journal of Applied Behavior Analysis, 10, 121-126.

Hopkins, K.D. (1982). The unit of analysis: Group means versus individual observations. American Educational Research Journal, 19(1), 5-18.

Hopkins, K.D., Stanley, J.C., & Hopkins, B.R. (1990). Educational and psychological measurement and evaluation (7th ed.). Englewood Cliffs, NJ: Prentice-Hall.

House, A., House, B., & Campbell, M. (1981). Measures of interobserver agreement: Calculation formulas and distribution effects. Journal of Behavioral Assessment, 3, 37-58.

Huber, P.J. (1981). Robust statistics. New York: Wiley.

Huck, S.W., Cormier, W.H., & Bounds, W.G. (1974). Reading statistics and research. New York: Harper & Row.

Huck, S.W., Cormier, W.H., & Bounds, W.G. (1974). Pseudo-experimental designs. In S.W. Huck, W.H. Cormier, & W.G. Bounds, Reading statistics and research (pp. 226-240). New York: Harper & Row.

Huck, S.W., Cormier, W.H., & Bounds, W.G. (1974). True experimental designs. In S.W. Huck, W.H. Cormier, & W.G. Bounds, Reading statistics and research (pp. 243-269). New York: Harper & Row.

Jacobson, N.S., & Revenstorf, D. (1988). Statistics for assessing the clinical significance of psychotherapy techniques: Issues, problems, and new developments. Behavioral Assessment, 10, 133-145.

Jacobson, N.S., & Truax, P. (1991). Clinical significance: A statistical approach to defining meaningful change in psychotherapy research. Journal of Consulting and Clinical Psychology, 59, 12-19.

Jones, L.V. (1988). Educational assessment as a promising area for psychometric research. Applied Measurement in Education, 1, 233-241.

Jones, R.R., Weinrott, M., & Vaught, R.S. (1978). Effects of serial dependency on the agreement between visual and statistical inference. Journal of Applied Behavior Analysis, 11, 277-283.

Karweit, N., & Slavin, R.E. (1981). Measurement and modeling choices in studies of time and learning. American Educational Research Journal, 18, 157-171.

Kazdin, A.E. (1976). Statistical analyses for single-case experimental designs. In M. Hersen & D.H. Barlow (Eds.), Single case experimental designs: Strategies for studying human behavior (pp. 265-316). New York: Pergamon Press.

Kazdin, A.E. (1977). Artifact, bias, and complexity of assessment: The ABCs of reliability. Journal of Applied Behavior Analysis, 10, 141-150.

Kazdin, A.E. (1979). Unobtrusive measures in behavioral assessment. Journal of Applied Behavior Analysis, 12, 713-724.

Kempthorne, O. (1955). The randomization theory of statistical inference. Journal of the American Statistical Association, 50, 946-967.

Kennedy, C.H. (1992). Trends in the measurement of social validity. The Behavior Analyst, 15, 147-156.

Kent, R.N., Kanowitz, J., O'Leary, K.D., & Cheiken, M. (1977). Observer reliability as a function of circumstances of assessment. Journal of Applied Behavior Analysis, 10, 317-324.

Kiess, H.O. (1996). Statistical concepts for the behavioral sciences (2nd ed.). Needham Heights, MA: Allyn & Bacon.

Kim, J.O., & Mueller, C.W. (1986). Factor analysis: Statistical methods and practical issues. London: Sage.

Kirk, J., & Miller, M. (1986). Reliability and validity in qualitative research. Newbury Park, CA: Sage.

Kirk, R. (1982). Experimental design: Procedures for the behavioral sciences (2nd ed.). Monterey, CA: Brooks/Cole.

Lindsley, O.R. (1964). Direct measurement and prosthesis of retarded behavior. Journal of Education, 147, 62-81.

Linn, R.L. (1983). Testing and instruction: Links and distinctions. Journal of Educational Measurement, 20, 179-189.

Linn, R.L. (Ed.). (1989). Educational measurement (3rd ed.). New York: Macmillan.

Lipsey, M.W. (1990). Design sensitivity: Statistical power for experimental research. Newbury Park: Sage.

Little, R.J., & Rubin, D.B. (1987). Statistical analysis with missing data. New York: Wiley.

Lubin, A. (1961). The interpretation of significant interaction. Education and Psychological Measurement, 21, 807-817.

Lykken, D.T. (1968). Statistical significance in psychological research. Psychological Bulletin, 70, 151-159.

Marascuilo, L.A., & Levin, J.R. (1983). Multivariate statistics for the social sciences. Monterey, CA: Brooks/Cole.

Marascuilo, L.A., & Serlin, R.C. (1988). Statistical methods for the social and behavioral sciences. New York: W.H. Freeman.

Mather, N., & Kirk, S. (1985). The type III error and other concerns in learning disability research. Learning Disabilities Research, 1, 56-64.

Maxwell, J.A. (1992). Understanding and validity in qualitative research. Harvard Educational Review, 62, 279-300.

McNemar, Q. (1962). Psychological statistics (3rd ed.). New York: Wiley.

Mehrens, W.A., & Lehmann, I.J. (1984). Measurement and evaluation in education and psychology (3rd ed.). New York: Holt, Rinehart and Winston.

Messick, S. (1980). Test validity and the ethics of assessment. American Psychologist, 35, 1012-1027.

Messick, S. (1984). The psychology of educational measurement. Journal of Educational Measurement, 21, 215-237.

Messick, S. (1989). Validity. In R. Linn (Ed.), Educational measurement (3rd ed., pp. 13-104). New York: Macmillan.

Messick, S. (1995). Validity of psychological assessment. American Psychologist, 50, 741-749.

Metfessel, N.S., & Michael, W.B. (1967). A paradigm involving multiple criterion measures for the evaluation of the effectiveness of school programs. Educational and Psychological Measurement, 27, 931-944.

Michael, J. (1974). Statistical inference for individual organism research: Some reactions to a suggestion by Gentile, Roden, and Klein. Journal of Applied Behavior Analysis, 7, 627-628.

Michael, J. (1974). Statistical inference for individual organism research: Mixed blessing or curse? Journal of Applied Behavior Analysis, 7, 647-653.

Miller, D.C. (1983). Handbook of research design and social measurement (4th ed.). New York: Longman.

Mitchell, J.V. (Ed.). (1985). The ninth mental measurements yearbook. Lincoln, NE: University of Nebraska Press.

Mitchell, J.V. (1988). Applied measurement in the Oscar Buros tradition: Current implications. Applied Measurement in Education, 1, 5-16.

Mosteller, F., & Tukey, J.W. (1977). Data analysis and regression: A second course in statistics. Reading, MA: Addison-Wesley.

Murphy, G., & Goodall, E. (1990). Measurement error in direct observations: A comparison of common recording methods. Behaviour Research & Therapy, 18, 147-150.

Narens, L., & Luce, R.D. (1986). Measurement: The theory of numerical assignments. Psychological Bulletin, 99, 166-180.

Nettelbeck, T., & Lally, M. (1976). Inspection time and measured intelligence. British Journal of Psychology, 67, 17-22.

Newman, D.L., Kundert, D.K., Lande, D.S., & Bull, K.S. (1988). Effect of varying item order on multiple-choice test scores: Importance of statistical and cognitive difficulty. Applied Measurement in Education, 1, 89-97.

Nie, N., Hull, C., Jenkins, J., Steinbrenner, K., & Bent, D. (1975). SPSS: Statistical package for social services (2nd ed.). New York: McGraw-Hill.

Nunnally, J. (1960). The place of statistics in psychology. Education and Psychological Measurement, 20, 641-650.

Payne, R.W., & Jones, H.G. (1957). Statistics for the investigation of individual cases. Journal of Clinical Psychology, 13, 115-121.

Osgood, C.E. (1952). The natue and measurement of meaning. Psychological Bulletin, 49, 197-237.

Osgood, C.E., Suci, G.J., & Tannenbaum, P.H. (1957). The measurement of meaning. Urbana, IL: University of Illinois Press.

Payne, R.W., & Jones, H.G. (1957). Statistics for the investigation of individual cases. Journal of Clinical Psychology, 13, 115-121.

Pedhazur, E.J., & Schmelkin, L.P. (1991). Measurement, design, and analysis: An integrated approach. Hillsdale, NJ: Erlbaum.

Popham, W.J. (1978). Criterion-referenced measurement. Englewood Cliffs, NJ: Prentice-Hall.

Popham, W.J. (1987). The merits of measurement-driven instruction. Phi Delta Kappan, 68, 679-682.

Powell, J., Martindale, B., & Kulp, S. (1975). An evaluation of time-sample measures of behavior. Journal of Applied Behavior Analyis, 8, 463-470.

Powell, J., Martindale, B., Kulp, S., Martindale, A., & Bauman, R. (1977). Taking a closer look: Time sampling and measurement error. Journal of Applied Behavior Analysis, 10, 325-332.

Rowley, G.L. (1976). The reliability of observational measures. American Educational Research Journal, 13, 51-59.

Ryff, C.D., & Singer, B. (1996). Psychological well-being: Meaning, measurement, and implications for psychotherapy research. Psychotherapy and Psychosomatics, 65, 14-23.

Saffran, J.R., Aslin, R.N., & Newport, E.L. (1996). Statistical learning by 8-month old infants. Science, 274, 1926-1928.

Schmeiser, C.B. (1982). Use of experimental design in statistical item bias studies. In R.A. Berk (Ed.), Handbook of methods for detecting test bias (pp. 64-95). Baltimore, MD: The Johns Hopkins University Press.

Schmidt, W. (1983). Content biases in achievement tests. Journal of Educational Measurement, 20, 165-178.

Sechest, L., & Yeaton, W.H. (1981). Meaningful measures of effect. Journal of Consulting and Clinical Psychology, 49, 766-767.

Siegel, S. (1956). Nonparametric statistics for the behavioral sciences. New York: McGraw-Hill.

Sethi, I., & Jain, A.K. (Eds.). (1991). Artificial neural networks and statistical pattern recognition: Old and new connections. New York: Elseiver Science.

Siegel, S., & Castellan, N.J. (1988). Nonparametric statistics for the behavioral sciences (2nd ed.). New York: McGraw-Hill.

Smith, B., & Sechrest, L. (1991). Treatment of aptitude X treatment interactions. Journal of Consulting and Clinical Psychology, 59, 233-244.

Snow, R.E. (1969). Unfinished Pygmalion. Contemporary Psychology, 14, 197-199.

Snow, R.E. (1974). Representative and quasi-representative designs for research on teaching. Review of Educational Research, 44, 265-291.

Snow, R.E. (1991). Aptitude-treatment interaction as a framework for research on individual differences in psychotherapy. Journal of Consulting and Clinical Psychology, 59, 205-216.

Snow, R.E. (1993). Construct validity and constructed-response tests. In R.E. Bennett & W.C. Ward (Eds.), Construction versus choice in cognitive measurement (pp. 45-60). Hillsdale, NJ: Erlbaum.

Snow, R.E., & Farr, M.J. (1984). Aptitude, learning, and instruction, Vol. 3: Cognitive and affective process analysis. Hillsdale, NJ: Erlbaum.

Stanley, J.C. (1957). Controlled experimentation in the classroom. Journal of Experimental Education, 25, 195-201.

Stanley, J.C. (1957). Research methods: Experimental design. Review of Educational Research, 27, 449-459.

Stanley, J.C. (1965). Quasi-experimentation. School Review, 73, 197-205.

Stanley, J.C. (1966). A common class of pseudo-experiments. American Educational Research Journal, 3, 79-87.

Stanley, J.C., George, W.C., & Solano, C.H. (Eds.). (1977). The gifted and creative: A fifty-year perspective. Baltimore: The Johns Hopkins University Press.

Sternberg, R.J., & Detterman, D.K. (Eds.). (1979). Human intelligence: Perspectives on its theory and measurement. Norwood, NJ: Ablex.

Stine, W.W. (1989). Meaningful inference: The role of measurement in statistics. Psychological Bulletin, 105, 147-555.

Tabachnick, B.G., & Fidell, L.S. (1989). Using multivariate statistics (2nd ed.). New York: Harper & Row.

Terman, L.M. (1960). A measurement of intelligence. Boston: Houghton Mifflin.

Thorndike, R.L., & Hagen, E. (1969). Measurement and evaluation in psychology and education (3rd ed.). New York: Wiley.

Toothaker, L.E., & Miller, L. (1996). Introductory statistics for the behavioral sciences (2nd ed.). Pacific Grove, CA: Brooks/Cole.

Wainer, H., & Braun, H.I. (Eds.). (1987). Test validity. Hillsdale, NJ: Erlbaum.

Webb, E.J., Campbell, D.T., Schwartz, R.D., & Sechrest, L. (1966). Unobtrusive measures: Nonreactive research in the social sciences. Chicago: Rand McNally.

Weiderholt, J.L., Cronin, M.E., & Stubbs, V. (1982). Measurement of functional competencies and the handicapped: Constructs, assessments, and recommendations. In J.T. Neisworth (Ed.), Assessment in special education (pp. 101-115). Rockville, MD: Aspen.

Weiner, B.J. (1971). Statistical principles in experimental design. New York: McGraw-Hill.

Wesson, C, King, R., & Deno, S. (1984). Direct and frequent measurement of student performance: If it's so good for us why don't we do it? Learning Disabilities Quarterly, 7, 45-58.

White, O.R., & Liberty, K.A. (1976). Behavioral assessment and precise educational measurement. In N.G. Haring & R.L. Schiefelbusch (Eds.), Teaching special children (pp. 31-71). New York: McGraw-Hill.

Williams, R., & Zimmerman, D. (1984). On the virtues and the vices of standard error of measurement. The Journal of Experimental Education, 52, 231-233.

Wilson, V.L. (1986). Analysis of interactions in aptitude-treatment interaction research. In C.R. Reynolds & V.L. Wilson (Eds.), Methodological and statistical advances in the study of individual differences. New York: Plenum.

Winer, B.J. (1971). Statistical principles in experimental design (2nd ed.). New York: McGraw-Hill.

Wolcott, H.F. (1990). On seeking--and rejecting--validity in qualitative research. In E.W. Eisner & A. Peshkin (Eds.), Qualitative inquiry in education: The continuing debate (pp. 121-152). New York: Teachers College Press.

Wolcott, H.F. (1990). Writing up qualitative research. Newbury Park, CA: Sage.

Wolf, M.M. (1978). Social validity: The case for subjective measurement, or how applied behavior analysis is finding its heart. Journal of Applied Behavior Analysis, 11, 203-214.