Related Experiment Video
Updated: Jul 7, 2026

Assessment of Social Cognition in Non-human Primates Using a Network of Computerized Automated Learning Device (ALDM) Test Systems
Published on: May 5, 2015
Trial on personhood for chimp "Hiasl"
Martin Balluch1, Eberhart Theuer
1Verein Gegen Tierfabriken, Vienna, Austria. vgt@vgt.at
Abstract:
In 1982, the chimp "Hiasl" was abducted from the Western African jungle to be used in scientific experiments in Austria. Since his abduction was illegal, he was freed at the airport. After long legal battles with the company responsible for his abduction, he grew up in a human family and now lives at a Viennese animal shelter. In 2006, this shelter ran into financial difficulties and "Hiasl" was threatened with deportation. Therefore in 2007, his close friends started legal procedures to have him declared a person and to have a legal guardian appointed for him to represent him in court. Four renowned experts in anthropology, biology and law supported the case scientifically. According to Austrian civil law, all members of the genus "Homo" are persons. Sharing 99.4% of human genes, chimps also belong into this genus. Secondly, it is argued that in the context of civil law the definition of person biologically means possessing a "theory of mind", which chimps do. Only if "Hiasl" is accepted as a person, his interests will matter and he can be represented in a legal case against his deportation, so that justice could be done. Only as a person, he can collect money for himself. And only as a person, he could start legal procedures, claiming for damages against those responsible for his abduction, to secure his future.
Related Concept Videos
Cognitive Learning
E. C. Tolman's theory of purposive behavior emphasizes that much behavior is goal-directed. He argued that to understand behavior, we must look at the entire sequence of actions leading to a goal. For instance, high school students study hard, not just due to past reinforcement but also to achieve the goal of getting into a good college.
Tolman introduced the idea that behavior is influenced by...
The Stanford Prison Experiment
Wald-Wolfowitz Runs Test II
For binary data, runs are identified using symbols such as + and −, or equivalently, 1s and 0s. In...

