Transcription of RESEARCH IN EDUCATION
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EIGHTH EDITIONnRESEARCHIN EDUCATIONJohn W. BestButler University, EmeritusJames V. KahnUniversity of Illinois at ChicagoAllyn and BaconBoston l London l Toronto l Sydney l Tokyo l SingaporeVice President, EDUCATION : Nancy Forsyth ,>sp,,Editorial Assistant: Cheryl OuelletteMarketing Manager: Kris FarnsworthSr. Editorial Production Administrator: Susan McIntyreEditorial Production Service: Ruttle, Shaw & Wetherill, Buyer: Linda CmManufacturing Buyer: Suzanne LareauCover Administrator: Suzanne HarbisonCopyright 0 1998,1993,1989,1986,1981,1977,1970,1959 by Allyn & BaconA Viacom Company160 Gould StreetNeedham Heights, MA 02194 Intemel: Online: keyword: College OnlineAll rights reserved. No part of the material protected by this copyright notice may bereproduced or utilized in any form or by any means, electronic or mechanical, includingphotocopying, recording, or by any information storage and retrieval system, withoutwritten permission from the copyright of Congwss Cataloging-in-Publication DataBest, John in EDUCATION / John W.
Threats to External Experimental Validity 168 Experimental Design 169 Pre-Experimental Designs 170 ... Answers to Statistics Exercises 475 Selected Indexes, Abstracts, and Reference ... professionals should understand some of the techniques used in identifying prob-lems, forming hypotheses, constructing and using data-gathering instruments, ...
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