How scientist discovered that chimps can rate their own performances on tests?

Answer 1

Scientists discovered that chimpanzees can rate their own performances through a series of cognitive tests designed to assess self-awareness and metacognition. In experiments, chimps were given tasks where they had to choose between different options, and afterward, they were allowed to indicate whether they felt confident or unsure about their choices. The results showed that chimps who felt uncertain were more likely to opt for a "retry" option, demonstrating an awareness of their own knowledge and performance. This capacity for self-assessment suggests a level of cognitive sophistication previously attributed primarily to humans.