How Should the Researcher Proceed If the Initial Test for Reliability

How should the researcher proceed if the initial test for reliability of an instrument has been conducted on a sample that has different characteristics from those of the current study sample?

A) Conduct a pilot study on the current sample to determine whether reliability is maintained.
B) Use the instrument with the current sample because reliability holds across samples.
C) Use the Kuder-Richardson formula to recalculate the reliability coefficient.
D) Discard or reject the instrument.

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