Aim: The aim of the study was to descrive the initial results of the first longitudinal case attempt to investigate language acquisition between 2 pygmy chimps (Kanzi and Mulika) and 2 common chimps (Austin and Sherman).
M&P: Quasi experimental design; (compared pygmy chimps/bonobo chimps and common chimps). Its also a longitudinal case study; 4 chimps studies; data collected over 10 years; results reported are from a 17 month period. Therefore IV is species of chimps (Pygmy or common chimp) and DV was language acquisition.
Participants: Kanzi; male pygmy chimp; aged 30-47 months; Kanzi born in captivity; assigned to Language Research Centre (LRC) at 6 months old; with his mother Matata; Matata was a wild caught chimp who served as a subject in previous studies of non-verbal communication. Mulika; female pygmy chimp; aged 11-21 months; Kanzi's younger sister; spent a lot of time with Matata, but both enjoyed human company.
Austin and Sherman; common chimps; assigned to the LRC at 1.5 years and 2.5 years of age; removed from mothers before they came to the LRC.