Add to ORKGThis paper delimits and explicates threats to external validity particularly problematic in evaluation research. Five categories of factors are discussed: selection effects, measurement effects, confounded treatment effects, situational effects, and effects due to differential mortality. The paper focuses on pointing up specific ways in which each of the factors threaten generalizability and possible solutions to the methodological problems presented
Great care is generally taken in epidemiologic studies to ensure the internal validity of causal eff...
The article identifies a latent debate in the recent literature on the role and worth of experiments...
In recent years, increasing attention has been paid to problems of external validity, specifically t...
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68477/2/10.1177_014616727400100102.pd
Background External validity of study results is an important issue from a clinical point of view. F...
The increasing demand for evidence-based practice has put focus on the gap between research and prac...
concerns require more attention in theoretical research. The author argues that one cannot “enhance ...
The paper provides a first survey of the literature on external validity. The starting point for thi...
[Abstract: We show that the common claim that internal validity should be understood as prior to ext...
Francesco Guala once wrote that ‘The problem of extrapolation (or external validity as it is sometim...
Much of the methodological discussion around experiments in economics and other social sciences is f...
Researchers often aim to make correct inferences both about that which is actually studied (internal...
Reliability and validity describe desirable psychometric characteristics of research instruments. Th...
We show that the common claim that internal validity should be understood as prior to external vali...
In making treatment decisions, doctors and patients must take into account relevant randomised contr...
Great care is generally taken in epidemiologic studies to ensure the internal validity of causal eff...
The article identifies a latent debate in the recent literature on the role and worth of experiments...
In recent years, increasing attention has been paid to problems of external validity, specifically t...
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68477/2/10.1177_014616727400100102.pd
Background External validity of study results is an important issue from a clinical point of view. F...
The increasing demand for evidence-based practice has put focus on the gap between research and prac...
concerns require more attention in theoretical research. The author argues that one cannot “enhance ...
The paper provides a first survey of the literature on external validity. The starting point for thi...
[Abstract: We show that the common claim that internal validity should be understood as prior to ext...
Francesco Guala once wrote that ‘The problem of extrapolation (or external validity as it is sometim...
Much of the methodological discussion around experiments in economics and other social sciences is f...
Researchers often aim to make correct inferences both about that which is actually studied (internal...
Reliability and validity describe desirable psychometric characteristics of research instruments. Th...
We show that the common claim that internal validity should be understood as prior to external vali...
In making treatment decisions, doctors and patients must take into account relevant randomised contr...
Great care is generally taken in epidemiologic studies to ensure the internal validity of causal eff...
The article identifies a latent debate in the recent literature on the role and worth of experiments...
In recent years, increasing attention has been paid to problems of external validity, specifically t...