Why apes' abilities have been misunderstood for decades

Hundreds of studies have told us that apes are smart - but just not as smart humans. But apes' intelligence may be entirely misunderstood because researchers have so far failed to measure it fairly and accurately. The study suggests that what we think we know about apes' social intelligence is based on wishful thinking and flawed science, and apes may actually be smarter than currently thought. One of the suggestions made by the researchers is to conduct studies where apes are'adopted' by humans to give the clearest available comparison between the two species. In order to improve upon flawed experimental designs in ape intelligence studies, researchers cited four possible remedies.