Validity issues in research on Vietnam veteran adjustment
Related Experiment Video
Updated: Aug 15, 2026

Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity
Published on: July 1, 2014
Abstract:
For 2 decades America's Vietnam veterans have been viewed as presenting special problems, and researchers from various disciplines have attempted to understand the network of cause-and-effect relationships accounting for their psychosocial status. In this article, Cook and Campbell's (1979) framework is used to examine validity issues in Vietnam veteran research. Threats to each of the types of validity (statistical conclusion, internal, construct, and external) are discussed using examples from the literature. To counteract these threats and strengthen future research, 7 recommendations are offered.
Related Concept Videos
The Scientific Method
Longitudinal Research
Reliability and Validity
Regression Toward the Mean
Cognitive Dissonance

