The 16PF instrument is a robust measure of personality traits. It was developed by Raymond Cattell in 1949 and the current fifth edition is one of the most valid predictors of human behaviour and is based on over 50 years of research and testing.

The 16PF questionnaire assesses an individual’s personality against 16 factors. This provides a valid and accurate and proven predictor of future behaviour. The 16 factors are: 

Warmth
Desire to develop close relationships with others

Emotional Stability
How calmly you respond to life’s demands

Liveliness
How freely and spontaneously you will express yourself

Social Boldness
How much at ease you feel in social situations

Vigilance
The extent to which you are cautious of others motives

Privateness
How much you like to keep personal information to yourself

Openness to Change
Extent to which you enjoy new situations and experiences

Reasoning
Extent to which you can solve numerical and verbal problems

Dominance
Tendency to assert influence and/or control others

Rule-Consciousness
How much value is placed on externally imposed rules

Sensitivity
Extent to which emotions and sentiments influence outlook and judgment

Abstractedness
How much attention is given to abstract rather than concrete observations
 
Apprehension
How much you are prone to self-criticism

Self-Reliance
How much you enjoy your own company and trust your own judgment 

Tension
How easily situations can cause tension