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A New Science
The Research Problem Research Plan and Pilot Study
Letter sent to a participant in a field research project
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ability ability grouping achievement test administered American Psychological Association analysis analysis of variance attitude basic behavior cards causal-comparative chapter classroom content analysis content validity control group criterion dependent variable determine discussed educa educational research effect error evaluation example experiment experimental treatment factors findings grade graduate student Hawthorne effect historical research hypothesis important Index individual instruction interest interview involved Journal literature mathematics measures method Minicourse N rays null hypothesis objectives observer obtain percent persons phi coefficient placebo population possible posttest predictive validity pretest procedures Psychological Psychological Abstracts pupils questionnaire questions random sample reading relationship reliability research data research design research problem research project research worker respondent sciences selected simple random sampling situation sources specific standardized tests statistical significance subjects teachers teaching techniques tion tional topic types usually variables variance