eLife assessment
Gordon-Fennell et al. present a low-cost, open-source platform for measuring action elicitation and consummatory behavior in head-fixed animals. The findings are important because they allow animals to perform a truly voluntary action whilst their head is held still, and the evidence supporting them is both comprehensive and compelling (in some cases even exceptional). The results have the potential to have a broad impact in the field as many labs start to move towards measuring head-fixed behavior effectively, although this is said with the caveat that such behavior will never be an ideal replication of naturalistic behavior.