Warneken, F., Hare, B., Melis, A.P., Hanus, D., & Tomasello, M. (2007). Spontaneous altruism by chimpanzees and young children. PLoS Biology, 5 (7), 1414 – 1420.
These videoclips show examples from three experiments with 18-month-old children and semi-free ranging chimpanzees. We found that both chimpanzees and human children helped altruistically, regardless of any expectation of reward (Experiment 1). They continued to help even when helping was made more effortful in that chimpanzees had to climb up into a raceway and children had to surmount an array of obstacles in order to help (Experiment 2). In the last experiment, chimpanzees helped other conspecifics: When one individual was unsuccessfully trying to open a door which was blocked by a chain, the other individual helped by releasing the chain.
3.1. Experiment 1.
Chimpanzee in condition Reaching/No Reward
3.2. Experiment 1.
Child in condition Reaching/No Reward
3.3. Experiment 2.
Chimpanzee in condition No Reaching.
3.4. Experiment 2.
Child in condition Reaching.
3.5. Experiment 3.
Chimpanzee helps in experimental condition.