Add Yahoo as a preferred source to see more of our stories on Google. A sleight-of-hand magic trick which often catches humans out only fools monkeys with opposable thumbs – a trait shared with humans ...

ST. LOUIS – Magic Amanda is adept at amazing sleight-of-hand magic tricks. She’s so good, in fact, that you can see her on ...

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 ...

A Humboldt's squirrel monkey is fooled by the "French Drop" magic trick. Credit: E. Garcia-Pelegrin et al., 2023 The key to a successful sleight-of-hand magic trick is how well a magician manipulates ...

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 ...

Psychologists used a sleight-of-hand trick called the French drop, in which an object appears to vanish when a spectator assumes it is taken from one hand by the hidden thumb of the other hand. The ...