There was a highly significant difference in variances in response times between the Lab (mean Variance = 26,396) and Web (mean Variance = 16,227) or CS (mean Variance = 18,742) samples, F (2, 110) = 26.22, p < 0.0001.
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Reaction Time Data in Music Cognition: Comparison of Pilot Data From Lab, Crowdsourced, and Convenience Web Samples.
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