Fig. 3From: Effects of reduced kinematic and social play experience on affective appraisal of human-rat play in ratsIndividual repeatability of number of a 50-kHz and b 22-kHz USVs per tickling session. Each dot represents one tickling session and connected dots of the same colour are from the same individual. X-axis shows the consecutive test days and y-axis shows the number of 50-kHZ USVs per session. Each column shows one experimental conditionBack to article page