Figure 7. Prior to door-opening, rats are equally motivated to help, but show more activity for trapped cagemates than for strangers from a familiar strain.
(A) Across conditions and testing days, rats tested with cagemates (white circles) were more active in the period before door-opening than were rats tested with strangers from a familiar strain (black circles). (B) The distance from the restrainer was not different for rats tested with cagemates (white circles) and strangers from a familiar strain (black circles).