Acquiescence Bias

Acquiescence bias is a cognitive bias that finds survey respondents have a tendency to agree with statements made in a survey.

This is especially prominent when the statement is a "truism" or there is some doubt as to the correct answer. This agreeableness is often deemed a sort to "yea-saying" or a tendency to agree when in doubt about the correct answer. This was tested by a researcher who administered both the California F-scale and a reverse-keyed (a reworded version that was intended to invoke answers opposite to the F-scale inventory) and found a positive correlation amongst the test subjects demonstrating agreeableness rather than honesty in their replies.