Personality questionnaires are powerful tools that will allow you to predict an individual's behaviour and attitude at work.
The key to using a personality questionnaire is a good understanding of the position at hand and matching the personality traits to those required to excel in the role.
For example, one would generally expect a sales person to be persuasive, competitive, have high levels of energy, sociable and outgoing. Thus a candidate who does not have the traits may be less suitable, and specific probing in development areas to ascertain his/her suitability can be done before making a decision.
Some of the personality questionnaires we use at PPEARL are:
Saville Consulting Wave ®
Pearson Assessment's Orpheus and Giotto Questionnaires
Myers-Briggs Type Indicator® (MBTI®)
We typically use these questionnaires as they are widely recognised and well-validated tools developed for occupational assessment in the work-environment.