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Lewis, Jonathan P.; Geroy, Gary D. – 1991
Conducting observational research in a cross-cultural context invokes a unique set of difficulties. This paper describes sources of bias and threats to validity that are specific to cross-cultural research. It describes problems of cross-cultural research designs for descriptive studies, comparative research, and experimental research and outlines…
Descriptors: Anthropology, Comparative Analysis, Cross Cultural Studies, Experimental Groups
Bump, Wren M. – 1992
An analysis of covariance (ANCOVA) is done to correct for chance differences that occur when subjects are assigned randomly to treatment groups. When properly used, this correction results in adjustment of the group means for pre-existing differences caused by sampling error and reduction of the size of the error variance of the analysis. The…
Descriptors: Analysis of Covariance, Equations (Mathematics), Error of Measurement, Experimental Groups
Hilliard, Asa G.; Jenkins, Yolanda L. – 1979
This document describes the methodology and results of a pilot study and outlines the hypotheses and procedures of a final study to identify and measure racist behaviors and attitudes in adults. The impact of a slide presentation on racial attitudes was also examined. The context of the pilot study was a workshop on race relations designed to…
Descriptors: Adults, Attitude Change, Change Strategies, Experimental Groups
Zhang, Ke; Peck, Kyle L. – Canadian Journal of Learning and Technology, 2003
This study investigated the relative benefits of peer-controlled and moderated online collaboration during group problem solving. Thirty-five self-selected groups of four or five students were randomly assigned to the two conditions, which used the same online collaborative tool to solve twelve problem scenarios in an undergraduate statistics…
Descriptors: Undergraduate Students, Undergraduate Study, Predictor Variables, Control Groups
Shaffer, Warren F.; Penwarden, Jeffry R. – 1981
Twenty-two junior, senior, and graduate students from an introductory counseling class for nonmajors were introduced to the verbal psychotherapies, and randomly divided into treatment and control groups. The groups were treated identically and received the usual instructional program except for the treatment group receiving 30 minutes of…
Descriptors: Algorithms, Control Groups, Counseling Techniques, Counselor Training
HUMMEL, RAYMOND C. – 1966
THE CO-RELATED OBJECTIVES OF THIS STUDY WERE--(1) TO DEVELOP AND EVALUATE A MODEL OF EGO COUNSELING DERIVED, IN PART, FROM THE PSYCHOANALYTIC THEORY OF ADAPTIVE FUNCTIONING, AND (2) TO INVESTIGATE CERTAIN PSYCHOLOGICAL AND SOCIAL CONDITIONS UNDERLYING ACADEMIC UNDERACHIEVEMENT. A COUNSELED EXPERIMENTAL SAMPLE OF 53 BRIGHT, BUT ACADEMICALLY…
Descriptors: Academic Achievement, Comparative Analysis, Counseling, Counseling Theories
ROCKLYN, EUGENE H. – 1967
THIS ARTICLE TRACES THE ORIGIN AND EVALUATION OF A SPECIAL FOREIGN LANGUAGE TRAINING CONCEPT THAT EVOLVED OUT OF A SPECIFIC MILITARY NEED TO INTERROGATE NEWLY CAPTURED PRISONERS OF WAR TO ACQUIRE IMMEDIATE TACTICAL INFORMATION. THROUGH AN INITIAL FEASIBILITY STUDY, A REASONABLE SET OF VERBAL MATERIALS WAS SELECTED AS COURSE CONTENT, AND A…
Descriptors: Audiolingual Methods, Chinese, Experimental Groups, Language Programs
DIEMER, ANN H. – 1966
THIS EXPERIMENT WAS DESIGNED TO TEST WHETHER STUDENTS WHOSE GRADES ARE PARTLY DETERMINED BY THE PERFORMANCE OF OTHERS IN THE GROUP (THE COOPERATIVE CONDITION) WILL SCORE HIGHER ON EXAMINATIONS THAN THOSE WHOSE GRADES ARE DETERMINED BY THEIR RAW SCORES WITHIN THEIR GROUPS (COMPETITIVE CONDITION). WHEN COGNITIVE LEARNING IN THE COOPERATIVE…
Descriptors: Cognitive Measurement, Educational Sociology, Experimental Groups, Group Dynamics
Crawford, John; And Others – 1977
A number of potential threats to internal validity in true experiments are discussed. Programmatic research efforts proceeding from established correlational findings to experiments employing random assignment are described and used as referents in discussions of validity considerations. The collection of observational data is recommended for use…
Descriptors: Classroom Research, Control Groups, Data Analysis, Educational Experiments
Zach, Lillian; And Others – 1968
Studies were some problems of learning motivation and extrinsic reinforcement in a group of disadvantaged youngsters. Also tested was the hypothesis that learning would be facilitated for those children who received regular individual tutoring in addition to classroom instruction, regardless of conditions of reinforcement. Subjects were 60 Negro…
Descriptors: Academic Achievement, Black Youth, Control Groups, Disadvantaged Youth
Razik, Taher A. – 1969
The purpose of this project was to design, execute, and evaluate a film to be used as a public education program in rehabilitation counseling. The film "Will It Be You?" was produced to interest undergraduate students in a career in rehabilitation counseling and to inform the general public of the goals and services of rehabilitation counseling.…
Descriptors: College Students, Control Groups, Demonstration Programs, Educational Programs
Office of Economic Opportunity, Washington, DC. – 1971
The intent of this experimental program is to test the impact of an assistance system on issues such as work incentive, cost of benefits, administrative costs, and other corollary issues. The structure is to provide assistance that increases as earned income declines, and decreases as earned income increases. Unlike the President's Welfare Reform…
Descriptors: Control Groups, Economically Disadvantaged, Employed Parents, Experimental Groups
Kaufman, Maurice – 1972
The Distar I Reading, Language and Arithmetic programs were used with two first grade classes. The Distar II programs were used with two second grade classes. One first grade Distar class appeared to make some progress in oral language. Comparison of the first grade Distar classes with a first grade control class that used a Scott-Foresman basal…
Descriptors: Academic Achievement, Arithmetic, Comparative Analysis, Control Groups
Rubin, Donald – 1972
Matching, randomization, random sampling, and other methods of controlling extraneous variation are discussed. The purpose was to specify the benefits of randomization in estimating causal effects of treatments. It is concluded that randomization should be employed whenever possible, but the use of carefully controlled nonrandomized data to…
Descriptors: Control Groups, Definitions, Evaluation Methods, Experimental Groups
Steinman, Warren M. – 1971
Research was conducted relevant to two questions: First, does generalized imitation reflect the child's failure to discriminate reinforced from non-reinforced occasions? Second, are the results which characterize generalized imitation a function of confounded social and instructional influences that operate within the procedures used in…
Descriptors: Discrimination Learning, Elementary School Students, Evaluation Methods, Experimental Groups