ISSN:0164-7989    

DOI:10.1002/ev.1679

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThe focus on internal validity in randomized experiments can be misguided if construct validity is neglected. This chapter provides an overview of construct validity threats in randomized experiments and discusses some implications of reducing these threats for future evaluations.

ISSN:0164-7989    

DOI:10.1002/ev.1680

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractBecause of the differential perspectives, needs, and interests that undergird clinical and research objectives, program staff may wittingly or unwittingly sabotage randomization. A case study of the New Orleans Homeless Substance Abusers Program amply documents this process.

ISSN:0164-7989    

DOI:10.1002/ev.1681

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThis chapter presents how demoralization arose in a community‐based, randomized clinical trial and discusses related threats to validit

ISSN:0164-7989    

DOI:10.1002/ev.1682

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractIssues encountered when using random assignment in social service research are examined. Examples from three social programs are used to illustrate the problems that were encountered and the solutions developed.

ISSN:0164-7989    

DOI:10.1002/ev.1683

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractSome of the practical difficulties encountered when using an experimental design involving human subjects with multiple serious needs are outlined. Suggestions are given for dealing effectively with these difficulties, and the chapter provides further critical commentary.

ISSN:0164-7989    

DOI:10.1002/ev.1684

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThe use of experimental methods in a homeless service initiative confronted a variety of problems not reported by Lam, Jekel, and Hartwell. These include ethical and internal validity issues, organizational problems, effects on the research team itself, and the impact of research as a requirement for services on New Haven's public institutions.

ISSN:0164-7989    

DOI:10.1002/ev.1685

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractRandomized experiments often fail for entirely avoidable reasons. Drawing on examples from the NIAAA Cooperative Agreement program and related literature, the authors present some tools and opportunities for using randomized designs more judiciously.

ISSN:0164-7989    

DOI:10.1002/ev.1686

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractMost evaluators of social programs have little training or experience in designing or conducting field experiments. The goal of this chapter is to describe strategies that could be used to improve the design, implementation, and analysis of randomized field experiments.

ISSN:0164-7989    

DOI:10.1002/ev.1687

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThe atmosphere is changing as we examine the real‐world problems associated with the implementation of the experimental desig

ISSN:0164-7989    

DOI:10.1002/ev.1688

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY