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Allan Steckler, DrPH and Kenneth R. McLeroy, PhD

Allan Steckler is with the Department of Health Behavior and Health Education, School of Public Health, University of North Carolina, Chapel Hill. Kenneth R. McLeroy is with the Department of Community Health, School of Rural Public Health, Texas A & M University, College Station.

Correspondence: Requests for reprints should be sent to Allan Steckler, DrPH, School of Public Health, University of North Carolina, Chapel Hill, NC 27599-8400 (e-mail: steckler@email.unc.edu).

	Because this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

	INTRODUCTION

 
How are research results translated to public health practice? What is the responsibility of researchers, funding agencies, and journals in facilitating the use of research results in public health programs or policies? We address selected aspects of these questions and announce a new emphasis of the Journal on external validity for appropriate manuscripts.

	IMPORTANCE OF EXTERNAL VALIDITY

 
Over 40 years ago, Campbell and Stanley published their seminal work on experimental and quasi-experimental designs for research, in which they raised issues about threats to internal validity (whether or not observed covariation should be interpreted as a causal relationship) that exist when researchers are not able . . . [Full Text]

	THE JOURNAL ENDORSES A GREATER EMPHASIS ON EXTERNAL VALIDITY

 

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