The aim of this study was to look at human language capabilities in pygmy chimpanzees.
- The report looks at two pygmy chimpanzees; Kanzi and his sister Mulika. They're compared throughout to two common chimpanzees Austin and Sherman.
- Kanzi and Mulika learnt to use lexigrams through observation and natural communication with experimenters rather than through training.
- A record was kept of their vocabulary use throughout the report inidcating (1) correctness and (2) whether it was spontaneous, imitated or structured.