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Validity and Reliability in Experimental Research

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Desiderio IV Camitan

on 26 October 2013

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Transcript of Validity and Reliability in Experimental Research

Validity and Reliability in
Experimental Research

photo (cc) Malte Sörensen @ flickr
the relative accuracy or correctness of a study
the extent to which a set of research findings provides compelling information about causality
Internal Validity
the extent to which a set of research findings provides an accurate description of what typically happens in the real world
External Validity
the extent to which the independent and dependent variables in a study really represent the abstract hypothetical variables of interest
Construct Validity
how well a specific research hypothesis maps onto the broader theory that it was designed to test
Conceptual Validity
Reliability and Replicability
Direct Replication
Types of Replication
there can be a confident conclusion that variations in the independent variable caused any observed changes in the dependent variable
the conclusion can confidently be made that the findings of the study will apply to other people, other physical or social environments, or even other cultures
a direct reflection of the quality of one’s operational definitions as a result of proper operationalization
Construct validity has more to do with specific manipulations and measures in specific studies, and conceptual validity has more to do with research hypothesis and even research programs.
the consistency or repeatability of a measure or an observation
The true test of reliability is if the same procedure can render the same or at least similar result when used again.
the repetition of an experiment as identically as possible to the first performance, to determine whether the same results will be obtained
Systematic Replication
the repetition of an experiment while varying numerous factors considered to be irrelevant to the phenomenon to see if it will survive these changes
Conceptual Replication
the attempt to demonstrate an experimental phenomenon with an entirely new paradigm or set of experimental conditions
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