Chapter-4xx

Chapter-4xx - Did you really measure that? VALIDITY...

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Did you really measure that? VALIDITY (attention: please put on your thinking caps)
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Let’s Take a Test… What did it measure? Did it measure it well? How could we make this test better? How can you be sure it is then better?
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Validity Does a measurement (test) measure what it purports to? Reliability was last chapter, but it deals with consistency of results. One can have reliability without validity, but never the other way around.
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Let’s talk about validity Circumstantial Evidence – snow, OJ Thus, the nature of validity includes: (humor me here, please…) It’s not about the test, but the interpretation of results It is not a 1 or a 0, it can kinda be there It is specific to a particular construct (an important new word) It’s spiritual (poor analogy, but helpful) – unitary concept It’s subjective
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The Big 4 Areas in Validity Here are the 4 Content - coverage Construct – unique characteristic Criterion – prediction or association Consequences – a new kid on the block
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1. Content Validity
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This note was uploaded on 01/17/2012 for the course PSYC 442 taught by Professor Billestes during the Fall '11 term at Lee.

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Chapter-4xx - Did you really measure that? VALIDITY...

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