Threats to Validity in Retrospective Studies

Threats to Validity in Retrospective Studies

Threats to Scientific Validity in Truck Driver Hours-of-service Studies

Commercial truck driver Hours-of-Service (HOS) rules are periodically revised to reduce driver fatigue and improve driver health in costefficient ways. HOS research must demonstrate causal relationships between HOS parameters and important safety outcomes. Thus, two scientific requirements are internal validity (demonstration of true cause-effect relationships) and external validity (generaliza...

Validity Threats in Empirical Software Engineering Research - An Initial Survey

In judging the quality of a research study it is very important to consider threats to the validity of the study and the results. This is particularly important for empirical research where there is often a multitude of possible threats. With a growing focus on empirical research methods in software engineering it is important that there is a consensus in the community on this importance, that ...

Matching in retrospective studies.

Retrospective studies have always taken for granted that matching should be done on factors which affect the incidence of the disease. Worcester stated that when that "when a disease group is being compared with another group, matching is usually done on variables known to be related to the disease rather than on variables related to the outcome." Miettinen et al. however disagrees. They bel...

Threats to measurement validity in self reported data can be overcome.