We re-analyzed data of mice that completed training on a visual decision-making task (both basic and full tasks, see below) before 23 March 2020. All animals (140 male and female C57BL/6J, experiments performed across seven institutions) started with a week of water restriction, handling and habituation, after which they began training. On weekdays, if they did not earn all their required water in the task, they were supplemented with HydroGel. On weekends, mice received either measured water or HydroGel (40 μl/g of body weight or 1 ml/d, depending on institutional protocols), or free access to 2% CA water. See The International Brain Laboratory et al., 2020) for detailed descriptions of the apparatus, handling and husbandry, and automated training protocols. Data are available at https://data.internationalbrainlab.org.

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