An idiographic measure gives a picture (“graphic”) unique to the individual (“idio”). For example, a self-characterisation narrative written by a client will be a unique picture of how they see themselves.
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Nomothetic measures are the complement to idiographic measures as everyone has a value that can be compared with another person’s value on a nomothetic measure, e.g. we all a height and yours can be compared with mine numerically where, though we could each write a self-characterisation narrative there is no simple way to compare the story I might write about myself (you don’t want to know: honest!) with yours. Of course, we could compare how long each was, compare how others might rate each, but the narratives themselves simply aren’t numerically comparable.
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Card sort methods
Idiographic vs. nomothetic: history
Nomothetic
Repertory grids
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Chapter 2
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