Acquiescence is a common problem that occurs in :

Self-report measures

The self-report measures suffer from a number of problems. Social desirability is one of them. It is a tendency on the part of the respondent to endorse items in a socially desirable manner. Acquiescence is another one. It is a tendency of the subject to agree with items/questions irrespective of their contents. It often appears in the form of saying ‘yes’ to items. These tendencies render the assessment of personality less reliable.