A likelihood ratio test for mixture effects.

Jeff Miller

doi:10.3758/bf03192754

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A likelihood ratio test for mixture effects.

Jeff Miller

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Abstract

Under certain circumstances, it is theoretically important to decide whether a difference between two conditions in mean reaction time (RT) results from a relatively uniform slowing of all the responses in the slower condition or from a mixture of some slowed trials with some unslowed ones. This article describes a likelihood ratio test that can be used to differentiate between these two possibilities and reports computer simulations examining the power and Type I error rate of the test under conditions similar to those encountered in RT research. A freely available computer program, called MIXTEST, can be used both to carry out the likelihood ratio test and to conduct simulations evaluating the performance of the test within various settings.

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Behavioral Research Computer Simulation Humans Likelihood Functions Reaction Time Software Statistical Distributions Journal Article Research Support, Non-U.S. Gov't

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Jeff Miller. 2006. A likelihood ratio test for mixture effects.. https://doi.org/10.3758/bf03192754

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