A personality test was offered on this website constructed with the 50 item big five form from the International Personality Item Pool and The Dirty Dozen, a measure of the dark triad. This report will summarize the observed relations between the 8 measured traits

The data used are 2403 takes from individuals age 14-60 who on a 100 hundred point scale rated the accuracy of their answers greater than 80.

For the rest of this report:

  • E -> Extraversion
  • N -> Neuroticism
  • A -> Agreeableness
  • C -> Conscientiousness
  • O -> Openness to experience
  • M -> Machiavellianism
  • P -> Psychopathy
  • R -> Narcissism
Here are the basic correlations:
E 1
N 0.239 1
A 0.348 0.088 1
C 0.103 0.242 0.163 1
O 0.129 0.066 0.076 0.021 1
M 0.102 -0.202 -0.317 -0.189 0.094 1
P -0.145 -0.168 -0.66 -0.2 0.078 0.529 1
R 0.324 -0.229 -0.025 -0.138 0.055 0.476 0.231 1

It has been widely claimed that the social networking website Facebook promotes narcissism. There has even been some scholarship towards the effect. The paper Narcissism on Facebook: Self-promotional and anti-social behavior published by Christopher Carpenter in the journal Personality and Individual Difference reported that Facebook users that scored higher on the Narcissistic Personality Inventory were more like to use the website more often.

Using data from the personality tests on this website I am going to try to verify this research and extend it to all three of the dark triad personality traits (narcissism, machiavellianism and psychopathy). I will draw the data from three separate tests, one for each trait –the Narcissistic Personality Inventory, the MACH-IV, and the Levenson Self-Report Psychopathy Scale– and divide it into two groups, one group that was referred to the tests via Facebook and one group that came to the test via Google (this will serve as the control group, Google users would seem to relatively synonymous with web users, sorry Bing).

The data is graphed below (the vertical scales in each case is the full range each measured by each scale).

As can be seen, those that came to the test through Facebook were actually less narcissistic than individuals who came from Google. Ditto for psychopathy and machivallianism.

So, where does this leave the theory that Facebook is a simmering stew of narcissism? Well, this probably does not say that much as Google users who search out tests of narcissism are probably not an accurate sample of Google users. Still, it is not obviously consistent with the Facebook as narcissism hypothesis.

Here is the prevalence of Myers-Briggs personality types from the test on this website and in a general sample from the Center for Applications of Psychological Type:

The prevalence of MBTI types is both the general population and in an internet sample.

The scale is % of the population with that personality type.

As can be seen, their are significant differences.

For the past while I have had the question “What is your favorite movie?” appended to the end of the Levenson Self-Report Psychopathy Scale as an optional “Research item”. Two thousand takes later, lets see what can be learned from the data.

The LSRP measures psychopathy along two scales; primary psychopathy, a selfish, uncaring and manipulative attitude towards others, and secondary psychopathy, which reflects impulsiveness. Scores range from 1 to 5. This analysis will cover primary psychopathy scores.

The sample is 66% male. The average age was 33. The average score was 2.49.

The simplest analysis would be to aggregate scores by favorite movie, which can be seen below. Unfortunately, given the diversity of favorite movies, the sample sizes for each one are rather small and even given the modest threshold for inclusion of n=10, not many movies passed. The error bars are standard error.

So, no movies scored particularly high. If you have a friend who likes A Clockwork Orange, you don’t have to disown them, 3.3 is not concerning. However the movies with lower averages are more interesting. A person who scores 1.9 is, according to self-report, a very good person. If your favorite movie is 2001, pat yourself on the back.

Standard caveats apply.

I have taken the data collected from the Narcissistic Personality Inventory on this website (n ≈ 7000) and graphed the average scores by age:

And the distribution of scores by gender:

And finally average scores by age by gender:

College majors by narcissism

For the past while individuals who took the Narcissistic Personality Inventory test on this website were asked to enter what they majored in at college (if they did). Above is a graph of average narcissism across all the majors that had at least 25 data points (histogram of sample sizes) after some reduction (e.g. “Business Management”, “Business Administration” -> “Business”). The sample was 52% male and the average age was 40.03 years.

Nursing and Accounting which had lower end sample sizes are different with p < 10-5.

The individual data points can be downloaded here.

As random as the topic may seem, personality differences between right and left handed persons have been a topic of much study. Much of the research seems contradictory, see this review.

Research thus far seems to have been hampered by what seem insufficient sample sizes (most seem to have n=~200), which is not a problem here.

To add to this research, upon the completion of the Big Five Personality Test participants were asked to indicate their handedness with the choices “right” ,”left”, “ambidextrous”, “don’t want to answer”. The question was included for 2361 individuals. The break down in responses was n=2029, 248, 63, 21 respectively (13.3% identified as non-right handed compared to an estimated 11% of the population).

The differences in their big five personality traits are tabled below.

Trait Right Left p
Extraversion 3.09 3.01 0.22
Neuroticism 2.97 2.92 0.35
Agreeableness 3.9 3.92 0.71
Conscientiousness 3.4 3.4 0.99
Openness to experience 3.94 4.01 0.1

No differences were statistically significant at the p>0.05 level.

Sometimes various items are mixed into the Big Five Personality Test to see how they relate. The following items were included for 428 test takers.


A. I am socially liberal.

B. I am economically conservative.

C. I am religious.

Z. I frequently seek interpersonal drama.


A 0.052
B -0.077
C -0.022


It would seem that liberals tend to be more dramatic, however the weakness of both the experimental design and definition of the concepts (what exactly is ‘interpersonal drama’ anyway) render this conclusion extremely tentative.

In psychology, machiavellianism is the tendency to deceive and manipulate in service to one’s goals. It is measured by the MACH-IV, a 20 item self report inventory developed in the 1960′s.

Data from an online version of the test offered on this website is below.

Distributions of machivellianism scores grouped by gender

The sample (n=7185 who indicated a gender, that their answers were accurate, and consented to research use) consists mostly of people who searched for ‘machivallianism test’ or people who saw the test posted by their friends on forums and facebook. Average age was 29.3.

I took scores on the Levenson Self-Report Psychopathy Scale (n=1733) and averaged them by the hour of the day the test was taken:

The two scales of the LSRP are (1) a selfish, uncaring and manipulative attitude towards others and (2) impulsiveness and instability, scores are on the range 1-5.

There is a clear trend in both: it appears that (speaking from a pacific time zone perspective) the internet is nicest at high-noon and gets meaner and meaner until about 4 am.

To check the reliability of this trend, I divided the scores for primary psychopathy down into the last three months.

Psychopathy scores averaged by hour the test was taken for three months.

The trend does appear to hold true for two out of the three months, April is less pronounced, but still, its probably safe to say….