Note that this article deals with types of test validity, which determine the accuracy of the actual components of a measure. In quantitative research, you have to consider the reliability and validity of your methods and measurements.
Face validity: Does the content of the test appear to be suitable to its aims?.
Content validity: Is the test fully representative of what it aims to measure?.Construct validity: Does the test measure the concept that it’s intended to measure?.
If a method measures what it claims to measure, and the results closely correspond to real-world values, then it can be considered valid. Validity tells you how accurately a method measures something. The 4 Types of Validity in Research | Definitions & Examples
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