Odd Man Out test

[1] The Odd-Man-Out Reaction Time test correlates with "Intelligent Quotients (IQ) in the range of 0.30 to 0.60, a reliable and substantial effect.

[2] In their experiment, they found that the Odd-Man-Out Reaction Time test was capable of producing "measures that were reliable and correlate well with an individual's IQ.

"[2] An interesting result from the experiment was that there was no difference in the correlation between the Odd-Man-Out Reaction Time test and IQ when displays were presented in a more difficult manner.

[2] The expectation would be that the difficulty of a display would affect the correlation between Odd-Man-Out Reaction Time test and IQ.

[3] The Odd-Man-Out Reaction Time Test is important to the study of intelligence because it enables researchers to assess the speed of an individual's perception of relationships and difference among stimuli.