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. Author manuscript; available in PMC: 2018 Oct 24.
Published in final edited form as: Science. 2017 Jul 14;357(6347):eaan4749. doi: 10.1126/science.aan4749

Fig. 2. No evidence for contagious itch in mice.

Fig. 2.

(A to C) In no case was scratching behavior in uninjected mice observing histamine-injected demonstrators significantly greater than that of uninjected mice observing uninjected demonstrators, indicating that contagious itch does not appear to occur in mice. Chi-square analysis was used for imitative (A) and temporally contiguous (B) scratching, whereas the Kruskal-Wallis H test was used to compare the three uninjected conditions in (C). P < 0.05 was considered significant in all cases. n/s, nonsignificant comparisons.