Internal and External Validity (Simply Explained) 💡
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Internal and external validity, these terms pop up all the time in research methods courses, but what do they actually mean?
If you've ever wondered how to tell whether a study is truly solid or just looks good on paper, you're in the right place.
In this video, we’re cutting through the jargon and getting to the heart of what internal and external validity really mean, clearly explained, with examples that actually make sense.
So whether you're working on a research project or just trying to wrap your head around these concepts for an exam, let’s break it down together.
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00:00 Intro
00:42 What is validity?
01:57 #1 Internal validity (quantitative research)
03:48 #2 External validity (quantitative research)
04:36 #3 Internal and external validity in qualitative research
Validity is one of the three quality criteria used to assess the rigor of scientific studies.
Validity answers the question: How well does a method measure what it is supposed to measure? Or put differently: Can I answer my research question using this approach?
In another video, I’ve already given a general overview of the three quality criteria: objectivity, reliability, and validity.
But to clarify what validity means, here’s a simple example:
Imagine you step on the scale every morning to check your body weight. However, the scale is off by 2 kg every time. It provides consistent readings, so it’s reliable. But because it doesn’t show your true weight, it lacks validity.
The question of validity mainly comes up in quantitative research. Within this context, the characteristics of validity have been refined over time. In general, we distinguish between internal and external validity.
This video is about:
validity, internal validity, external validity, validity in research, validity types, validity vs reliability, validity and reliability in research, internal and external validity in research, internal and external validity
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