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J. Cohen and R. Schor gave helpful comments on the manuscript.
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Larkin, R.P. An algorithm for assessing bimodality vs. unimodality in a univariate distribution. Behavior Research Methods & Instrumentation 11, 467–468 (1979). https://doi.org/10.3758/BF03205709
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DOI: https://doi.org/10.3758/BF03205709