Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
West J Nurs Res. 2003 Oct;25(6):746-55.

Explanations for improvement in both experimental and control groups.

Author information

  • 1University of Texas, Austin School of Nursing, USA.

Abstract

A true experimental design with random assignment to groups protects against false causal inferences that could be made when both the treatment and control groups change because of factors such as testing effects, reactivity, contamination, maturation, history, and other measurement effects. The occurrence of these phenomena, however, provides interesting information about factors affecting health care attitudes, knowledge, and behavior change, which can interfere with a nursing study's ability to demonstrate an experimental effect. In this article, we discuss these design threats, illustrate them with examples from recent health research, and suggest strategies for decreasing them in clinical nursing studies.

PMID:
14528620
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for HighWire
    Loading ...
    Write to the Help Desk