**Original citation.** Liefooghe, B., Barrouillet, P., Vandierendonck, A., & Camos, V. (2008). Working memory costs of task switching. *Journal of Experimental Psychology: Learning, Memory, and Cognition, 34*(3), 478-494. doi: 10.1037/0278-7393.34.3.478 **Target of replication.** In their paper “Working memory costs of task switching”, Liefooghe, Barrouillet, Vandierendonck, and Camos (2008) address the extent to which task switching imposes requirements on working memory. Based on a unitary conception of working memory and the time-based resource-sharing model by Barrouillet, Bernardin, and Camos (2004), Liefooghe et al. assume that any switching between tasks requires attention that then becomes unavailable to processes that maintain memory traces in working memory storage, allowing for a decay of the stored information. Accordingly, they hypothesized that if working memory is impaired by the amount of time that attention is used in task switches, then increasing task switching demands (high-switch condition) will worsen recall performance. Critically, degraded stimuli should also produce this effect in low-switch conditions; we seek to replicate Liefooghe et al.’s finding that supported this theory, *F*(1, 24) = 5.29, *p* < .05. **A priori replication criteria.** A successful replication would find that the average recall score would be larger with normal digits than with degraded digits in a low-switch condition. This would demonstrate that, as in Liefooghe et al.’s original work, stimulus degradation impairs recall performance. **Sample.** Thirty-two right-handed psychology students with normal or corrected-to-normal vision took part in the study. No other inclusion/exclusion criteria were applied.