Researchers conducted an experiment on captive animals to understand their behavior. The study involved recording the reactions of these animals when they were tickled. A total of 13 animals were part of this experiment, which included different types of apes.

The findings of this study are based on the reactions of these animals. Further details about the study and its findings are available from KSAT 12, the local ABC affiliate in San Antonio, TX. The study's results provide insight into the behavior of these animals and their similarities to humans.