In critiquing nominal-level instruments, the reviewer checks the items in the instrument to be sure they are:
a. mutually exclusive and exhaustive.
b. precise and complete.
c. stable and structured.
d. valid and reliable.
ANS: A
Categories must be established in such a way that the datum will fit into only one of the categories (exclusive), and all data must fit into the established categories (exhaustive).
In nominal measures, the researcher decides what constitutes a "complete" instrument.
Individually the items would not necessarily be stable or structured.
The instrument in its totality would need to be valid and reliable.
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