Openness to experience- curiousity, adventure, ideas, experience
Conscientiousness- self-descipline, act dutifully, planned behaviour, achievment-aimer.
Extraversion- energetic, positive, surgency, stimuli seeker.
Agreeableness- compassionate, coopertative, not suspicious and antagonistic.
Neuroticism- experiences unpleasant emotions easily, anger, anxiety, depression, vulnerability.
These five factors are influenced by both heredity and environment. The test results are not necessaily constant but longitudinal and cross-sectional studies show data with a high degree in stability over time, a.k.a. test results usually don't significantly change over time. It is believed that if you score too low or too high on a certain category it could be a sign of a mental disorder.
Now out of 100 points each category could be divided equally into 20 points. So you have 100 points to designate to how you believe you are suited to each trait. 20 on one trait is average, 0 is low, and 40 is high.
To take the 16pf questionaire,
My 16pf results,
personality tests by similarminds.com