The information needed to determine the internal and external validity of an experimental study is discussed. Internal validity is the degree to which a study establishes the cause-and-effect ...

Scientists across all fields make various types of claims about their innovations. Validity tests check whether they deliver ...

This is a preview. Log in through your library . Abstract Methodological issues must be examined within the context of metatheoretical perspectives. More specifically, at the level of drawing ...

There is a distinction that one learns about on the first day of a course in psychological research methods. It is the difference between internal and external validity. Internal validity is ...

Cancer Causes & Control, Vol. 14, No. 10 (Dec., 2003), pp. 1001-1008 (8 pages) Objective: 'The Norwegian Women and Cancer Study' (NOWAC) was created as a national population-based cohort study by ...

We assessed the external validity of a prediction rule for nonseminomatous testicular cancer patients. The rule was developed to predict the probability of retroperitoneal metastases being benign ...

The three-step process shown in Table 2 can be used to assess the validity of a study's findings and determine if they are relevant to readers' practices. The first step in establishing validity is to ...