3.4 External and internal Validity
The two major forms of validity are the
external and internal validity. The external validity
of research findings is the
data’s ability to be generalized across persons, settings, and times
The Internal
validity is
about the ability of the research
instrument to measure what it is purported to measure. It answers the
question “does the instrument really measure what its designer claims it does?". It
consists of the following major forms: content validity, criterion-related
validity, and construct validity, among others.
Discuss the methods that you could use to
measure the different types of internal validity of a data collection
instrument?
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