It is useful for a researcher to offer the "don't know" option with questions that require mental effort in order to reduce:
a. Item breakoffs.
b. Item cheating.
c. Item omissions.
d. Refusals to participate.
Answer: c. Item omissions.
It is useful for a researcher to offer the "don't know" option with questions that require mental effort in order to reduce:
a. Item breakoffs.
b. Item cheating.
c. Item omissions.
d. Refusals to participate.
Answer: c. Item omissions.