Apparently, only 4 broad categories of music were considered:

       1. Reflective and complex music
       2. Fun and simple music
       3. Edgy and aggressive music
       4. Energetic and upbeat music

Apparently, responders were asked which type of music they enjoyed hearing, and then asked a list of many other questions to aid in determining their personality. Of course "perfect" correlation is not possible, but percentages might suggest a personality profile. As an example, if out of 100 questions, 75 were answered in a given way, that would indicate that one could be 75% sure of belonging to a stated personality.

Disclaimer
This is what Musical Preferences seem to say about personality!
Researchers reported that the four musical categories mentioned above were relatively independent, meaning that some responders could be high on one category and low on others, or high on all of them, or low on all of them, etc. Obviously, only broad generalizations can be drawn, so it is quite likely that certain aspects of the feedback will fit some persons better than others, and it is even possible that none of it will fit a given individual very well.

Apparently, only 4 Personality traits seem to be have been considered.

       1. Liberal or conservative in thought. (Open or closed minds. Introvert/Extrovert.)
       2. Values and Politics. (Learning and Culture )
       3. Lifestyle (background)
       4. Use of Spare Time. (Movies watched)

1. Open to new experiences, creative, intellectual, and enjoy trying new things. In politics, they tend to lean toward the liberal side.

2. Wisdom, diversity, and fine arts are all important to them.

3. When it comes to lifestyle, high scorers in this category tend to be sophisticated, and relatively well off financially.

4. After a hard day of work, if they're not listening to music or reading a book, they enjoy documentary films, independent, classic, or foreign films.


Do you enjoy Fun and Simple: : such as Pop, Religious, Country, and Soundtrack music?
The laboratory research seems to indicate that people high on these genres, often have the following characteristics:

1. Tend to being introverted, unconventional, and artistic.

2. When it comes to morals and values, chances are that they lean toward the liberal side.

3. Consider beauty and inner harmony important principles in life.

4. When selecting a movie to watch, they prefer suspense movies, cult movies,or foreign films.


Do you enjoy edgy and aggressive music: such as Alternative, Rock, and Heavy Metal music?
The laboratory research seems to indicate that people high on these genres, often have the following characteristics:

1. Don't get their 'kicks' on skydiving or rock climbing.

2. They tend to be friendly, less assertive than the average person, and conventional.

3. They tend to place a lot of importance on family security, salvation, and tranquility.

4. When they're not listening to music, watching television, or reading a book, they probably enjoy watching a dramatic movie, major motion picture, romance movie, or classic film.


Do you enjoy energetic upbeat music: such as Hip-hop, Rap, Funk, Soul, and Electronic?
The laboratory research seems to indicate that people high on these genres, often have the following characteristics:

1. introverted, less assertive than the average person, and detail oriented.

2. As for politics and values, they tend to lean to the conservative side, and value intellect, ambition, and high art.

3. When it comes to lifestyle, low scorers on the energetic and upbeat dimension often come from the middle and upper classes.

4. When they're not reading, they're probably watching a romance movie, classic film, or western movie.

For one example, this writer enjoys Classical, Blues, Jazz, and Folk music, but also doesn't get his "'kicks' on skydiving or rock climbing", values intellect, watches a Classic film from time to time, and considers beauty and inner harmony important principles in life. Apparently then, he belongs to every single category above mentioned.

This brings us full circle to our starting point, and to the question, "What is the correlation between music and personality?" For many, it is an area of some confusion. Many people will wrongly jump to the conclusion that Music FORMS one's personality, while it in reality merely REFLECTS a personality? Just how much 'weight' should be placed on music as a personality forming factor. It is highly probable that music plays only a small part in forming character. Other factors such as early home life, income, films, friends, IQ, and neighborhood, among others, are most likely the principal factors in forming personality.

And so, the big question remains, just how good a factor is music in determining one's personality? For this writer, music is not a very reliable determinant, and should only be considered in the most broadest of ways. Still, it's an interesting thought.