Our tests are for entertainment purposes only. None of the tests on this site were designed by psychologists, or have been used by psychologists or other professionals. Having said this, the problems on this site were designed by professional puzzle authors, and sophisticated systems have been put in place to gather data for each test in order to give you an estimated IQ and percentile score. You can read a review of our site and tests here.

Raw Scores

Your score on each test is based on the raw score that you obtain. This means that each problem is weighted equally in obtaining your score. Many tests found elsewhere use scaled scores, which assign different weights to test items based upon overall difficulty.

Normative Methods

The methods used to acquire the data that are used as the basis for your score are very basic. It is assumed that the majority of the people taking the tests reside in the United States, are age 18+, and use English as their primary language. If these are not your demographics, or if you are over the age of 35, it may be safe to assume that you would score at least slightly higher on our tests if you were measured against other individuals who share your demographics. If the raw score that you obtain on "Test X" is 15 out of 30 problems correct, and 95% of the people who took Test X scored a 15 or below, you would have achieved a percentile score of approximately 95, which is equivalent to an IQ score of 126 on the old Stanford-Binet scale, and 124 on the Weschler scale and the most recent Stanford-Binet test (see "What Do IQ Scores Mean"). However, the IQ score and percentile that we actually give to you will be slightly higher than this. The reason is that a disproportionate number of people taking our tests are above average in comparison to the general population. Obviously the data we collect cannot be as accurate as that which is obtained in a controlled environment, such as a classroom. However, a number of screening, filtering, and anti-fraud measures have been put in place to increase the reliability of our data, and thus your score.

Leaderboards

In keeping with our "for entertainment purposes only" theme, leaderboards (high score lists, for those unfamiliar with this term) are available for our tests. The leaderboards are especially useful for you to see how you compare to others who have taken the tests. The leaderboards update every 24 hours in the middle of the night with the latest data that we have accumulated. No information about you whatsoever is displayed on the leaderboards - just your score.

Answers and Explanations

Answers and explanations are currently provided for all of our tests. Once you have completed a test, a link can be found through which you will see the answers and explanations, the answer you submitted for each problem, and whether or not you answered each problem correctly.

Free Accounts

You may create a free account that will log all of the tests that you have taken, the scores that you have achieved, and even which answers you chose. You will also have access to the answers and explanations for each test that you have taken through your account. To create an account, click here and then click the "Register" link. We request some optional demographic data from you through the account, but nothing that could be used to personally identify you, such as your name or street address. You do not have to provide any of this information. In a future release of our site we hope to utilize this data.

Educational Value

What our tests lack in assessment accuracy is hopefully made up for by virtue of their educational value. As stated above, the problems on our tests were created by professional puzzle authors (see "About Us" to learn more), and it is sincerely hoped that you will learn a few useful things about mathematics, language, logic, and lateral thinking (which is just a fancy term for creative problem solving) by way of our tests. But above all, we hope that you find them enjoyable.

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