Emode's IQ Test Development
Over the last two years, Emode's psychologists developed this IQ test using proven, high-quality IQ test questions such as those in the Mensa Workout tests and the Shipley Institute of Living Scale an intelligence test that focuses on both vocabulary and verbal abstract reasoning. Those are the skills that are associated with problem-solving ability and social comprehension/judgment.
Reliability of the IQ Score
Once we built the Emode IQ test, Emode performed a large-scale study to compare the results of people who had taken both the Emode IQ test and the established Shipley Institute of Living Scale (by Walter C. Shipley). The Shipley test has been used for more than 50 years to assess facets of intelligence. We did this to ensure that the way we constructed our test would yield reliable and valid IQ results.
We used scores calculated by the Shipley test as a basis for calibrating Emode's IQ test. That ensured a high association between the two tests and, because of that, the validity of our IQ scores. In fact, the Emode IQ test is highly reliable the Chronbach's alpha is .81. In other words, the questions on Emode's IQ test are internally consistent and they all measure intelligence accurately.
How Emode Calculates Intellectual Type
In the past, researchers who have constructed IQ tests have discovered additional patterns that relate to the categories of questions a particular test-taker answered correctly categories such as mathematical, visual, verbal and logical. When these researchers analyzed peoples' results, they found that, for instance, a test-taker might have answered the math-oriented and verbal questions correctly, yet tended to answer the logical questions incorrectly. From such patterns, experts were able to define some internal scales of intelligence to the overall IQ test. Thus, using those internal scales, they could offer an actual IQ score, such as 105, as well as a measurement of how well the test-taker did within each question category.
After 1 million people took the Emode IQ test, we ran what is called a "factor analysis" on the answers those people gave. This statistical analysis identified the similarity between groups of questions in our test. The analysis demonstrated that this particular IQ test accurately measured four underlying dimensions of intelligence: mathematical, visual-spatial, linguistic and logical.
Each of the questions in the Emode IQ test relates to one dimension of intelligence. How reliable are these dimensions? Well, for the scientists and statisticians out there, their reliability coefficients were .85, .84, .81 and .50, respectively. The gist of all of that is that Emode's scales of intelligence are highly valid and we can accurately tell you how high you scored on each of those scales relative to the other test-takersthus yielding an accurate intellectual type.
