SimilarMinds.com is a resource for personality tests and personality psychology. Currently, there are a number of personality tests online (MOTIV test, R-Drive test, Enneagram test, Advanced Enneagram, Compatibility test, Jung, Big 5, Word Association, and others). There is also Ask The Oracle which is a decision making tool.
All the tests at SimilarMinds.com are developed based on scientific measures used to ensure test validity. Statistical measures are used to ensure test questions measure what they are intended to measure. Some of the tests are experimental/beta versions but even those tests are made up of pre-tested and validated questions, they just won't be as tuned/refined as a non beta test. For more test info click here.
I periodically change the test questions (based on my ongoing research) or add new tests so check back and retake the tests on occasion.
After more than ten years of researching/experimenting with different systems, both conventional and unconventional, I've constructed the MOTIV personality system which is basically an enhanced revision of the Big Five personality system (the main academic personality model). You can think of it as the primary colors of personality. With the seven MOTIV 'colors' you can explain/understand any personality system (Myers-Briggs, Enneagram, etc.), type, orientation, behavior, disorder, etc..
For the last few years I've been tracking the user location of personality tests taken on this site so as to gather data on geographic personality differences on eight core personality traits (Materialism, Offbeat, Thinking, Interpersonal, Vital, Easygoing, Scientific, and Artistic). You can now view that data in sortable/searchable spreadsheets here - http://similarminds.com/vizdb/cities.html. I've omitted countries/regions/cities where there was not enough records to reach a level of reasonable statistical significance (below 900 records), but the database as a whole is now over a million records.
If you want to be on the mailing list and get notified when new tests are added, click here.
I'm available as a consultant (custom personality test development or for other personality related projects), I can be reached via the contact link below.
If you are interested in partnering on personality research projects, I can be reached via the contact link below.
I'm a bloody mess, how can I fix that? Start working on the following two things
Are the tests free? yes, provided you take them directly on the similarminds website
Can I post a link to your tests on my website? yes
Can I have a paper version of one of your tests? The only printable test I have available is the Global 5-SLOAN test. This test is based on the dominant academic personality model (the Big 5) so it is ideal for research (please alert me or any research/project use and send me a copy of the results). You can download it here (an answer key is included). Global 5 Type summaries (for making sense of results) can be downloaded here. A 39 page manual on the Global 5 system can be downloaded here.
Can I use one of your tests on my website or in some other way? Not without my permission (although you can link to any test without permission). Email your requests/proposals to me. I am too busy to respond to everyone, so if I don't respond, the answer is no. You can then produce a better offer or accept the no. If you want to use a test for academic research (or a school project), the Global 5-SLOAN test linked above is available provided you inform me of your use and send me your research/project results.