Monkeys with hands that resemble ours fall for a sleight-of-hand magic trick, but those without opposable thumbs aren’t fooled. These differences illustrate how primates’ expectations of the actions ...

An illusion involving a hidden thumb confounds capuchin and squirrel monkeys for the same reason it does humans -- it misdirects expected outcomes of actions they can carry out. However, marmosets ...

Psychologists have long studied how magic deceives us. Illusionists exploit shortcomings in our attention and perception to prevent us seeing what is in front of our eyes, and learning how their ...