Fig. 6

Historical change in the duration of housing and monitoring in the home cage: A duration spent in the home cage (n = 520 publications), B overall duration of measurement (n = 667 techniques), C duration of measurement per day (n = 699 techniques) using a home cage monitoring technique. For B and C, it must be noted that more than one technique for data measurement could be used in a study. If one of the techniques used to investigate parameters of interests could not be extracted from the publication, this technique was excluded for B and C. Note the differences in the scaling of the y-axis