The Big 5 IPIP Test is a free psychological assessment which measures an individual's personality traits according to the Five Factor Model (FFM) of personality. This widely accepted model consists of five major personality traits: Extraversion, Agreeableness, Conscientiousness, Neuroticism, and Openness to Experience. The test consists of 120 questions which focus on the intensity of each trait. The results are reported in terms of the percentile score of the individual for each trait, thus helping to gain insight into personality and compare scores to the general population. This tool can be very useful for psychologists and individuals who need to assess an personality traits in order to better understand their behavior.