The idea of studying the psychology of religion through a personality lens is not a new idea, however. There has been research to both support and refute the ability of personality traits to explain religious or spiritual involvement. Research using Eysenck's model has found that religiosity in general is associated with low psychoticism,[3] a factor associated inversely with agreeableness and conscientiousness.[4] A review of studies examined the relations between the FFM and measures of religiosity, spiritual maturity, religious fundamentalism, and extrinsic religion. General religiosity was mainly related to Agreeableness and Conscientiousness of the big five traits .[4] Additionally, there was a weak positive association with extraversion, and a very small but significant relationship with low openness to experience. This same study also found that the two different concepts of religiosity and spirituality both involve an overall compassionate attitude towards others and positively correlates with Agreeableness. Open, mature religiosity and spirituality were associated with high openness to experience, extraversion, agreeableness, and conscientiousness, and with low neuroticism. Religious fundamentalism was associated with higher agreeableness, and lower neuroticism and lower openness to experience. Extrinsic religiosity was associated with higher neuroticism but unrelated to the other personality factors. All of these relationships between personality and religion were small. This finding does not necessarily support the concept of personality for being the specific reason for religiosity, however this correlation with the FFM can lead to more in depth research on the topic.