Currently, the dominant model of personality research suggests that five main personality traits explain most individual differences; extraversion, neuroticism (or emotional stability), agreeableness, conscientiousness, and openness to experience. These five factors are called the Big Five, a term used to describe their broadness, not their greatness.
The Big Five were identified based on the lexical hypothesis, which suggested that as we are social creatures, the most important ways in which people were different would have had words invented for them. If someone is a cruel versus a kind person, it’s important for you to be able to describe them to your friend so your friend knows what to expect. Large numbers of personality-type words were then gathered from the dictionary, and underwent a statistical technique called factor analysis in order to find out which words clumped together-for instance, friendly, kind, and nice, are all similar words. The result was the Big Five.
This test of the Big Five is DeYoung, Quilty, and Peterson's (2007) Big Five Aspect scales. It measures the Big Five, along with two aspects for each of the five traits.
It contains 100 statements which you indicate how much the statement is correct for you, ranging from “Very inaccurate” to “Very accurate”. It should take approximately 10 to 15 minutes to complete.
After you have completed the test, you’ll be provided a free personality report for the Big Five and the two aspects for each of the five dimensions.