Assessing effect sizes, variability, and power in the on-line study of language production

• URL: http://arxiv.org/abs/2403.15459v1
• Date: Tue, 19 Mar 2024 11:49:03 GMT
• Title: Assessing effect sizes, variability, and power in the on-line study of language production
• Authors: Bürki Audrey, Vasishth Shravan,
• Abstract summary: We compare response time data obtained in the same word production experiment conducted in the lab and on-line. We determine whether the two settings differ in effect sizes, in the consistency of responses over the course of the experiment. We assess the impact of these differences on the power of the design in a series of simulations.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: With the pandemic, many experimental psychologists and linguists have started to collect data over the internet (hereafter on-line data). The feasibility of such experiments and the sample sizes required to achieve sufficient statistical power in future experiments have to be assessed. This in turn requires information on effect sizes and variability. In a series of analyses, we compare response time data obtained in the same word production experiment conducted in the lab and on-line. These analyses allow us to determine whether the two settings differ in effect sizes, in the consistency of responses over the course of the experiment, in the variability of average response times across participants, in the magnitude of effect sizes across participants, or in the amount of unexplained variability. We assess the impact of these differences on the power of the design in a series of simulations. Our findings temper the enthusiasm raised by previous studies and suggest that on-line production studies might be feasible but at a non-negligible cost. The sample sizes required to achieve sufficient power in on-line language production studies come with a non-negligible increase in the amount of manual labour.

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