Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Duration (s) of object investigation in wolves and dogs when tested with a sibling or with an unrelated animal in the pair condition tests. Box plots show the median and the interquartile range from the 25th to the 75th percentile. Whiskers indicate the 1.5 interquartile range of the data. Circles represent outliers.
