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Powers, Donald E. – ETS Research Report Series, 2012
Special preparation for tests has been a relatively contentious issue. The controversy has entailed (a) disagreement over the effectiveness of such preparation, (b) concern over unequal access to it, and (c) worries about its impact on the validity of test scores. This paper provides a brief history of ETS's involvement with, and contribution to,…
Descriptors: Test Preparation, College Entrance Examinations, Coaching (Performance), Scores

Chalifour, Clark L.; Powers, Donald E. – Journal of Educational Measurement, 1989
Content characteristics of 1,400 Graduate Record Examination (GRE) analytical reasoning items were coded for item difficulty and discrimination. The results provide content characteristics for consideration in extending specifications for analytical reasoning items and a better understanding of the construct validity of these items. (TJH)
Descriptors: College Entrance Examinations, Construct Validity, Content Analysis, Difficulty Level
Powers, Donald E. – ETS Research Report Series, 2005
This study examined how the practice of prepublishing prompts used on the writing section of the Graduate Record Examinations® (GRE®) General Test impacts test-preparation behavior, test performance, test validity, and examinee perceptions of the value of prompt prepublication. Researchers imposed modest experimental control over how participants…
Descriptors: Essays, Prompting, Cues, Writing Tests
Swinton, Spencer S.; Powers, Donald E. – 1980
A study was conducted in order to investigate the factor structure of the Graduate Record Examinations (GRE) Aptitude Test, which now includes an analytical module. Comparison of the factor structures of the Aptitude Test before and after modification suggested that the factor structure of the verbal and quantitative sections of the test has been…
Descriptors: College Entrance Examinations, Factor Analysis, Factor Structure, Graduate Study

Powers, Donald E.; Swinton, Spencer S. – Journal of Educational Psychology, 1984
This experimental study was conducted to: (1) provide further information on the susceptibility to special preparation of three Graduate Record Examination analytical item types; (2) determine the efficacy of self-study test familiarization materials for these types; and (3) ascertain the effects of several different components of special…
Descriptors: College Entrance Examinations, Graduate Study, Higher Education, Independent Study