People and ideas
Psychology
How people see, remember and decide, told through the classic experiments that measured the mind and what they found.
Fact files
All topics ›Clever Hans
1904
Year Hans became famous in Berlin
The Stroop effect
63.3 seconds
Mean time to name 100 plain colour squares, Stroop's 1935 experiment
The Mozart effect
1993
Year of the Nature paper behind the claim
The invisible gorilla
192 observers
Watched the main 1999 videos
The forgetting curve
2,300 syllables
Nonsense syllables Ebbinghaus built for his experiments
Stratton's inversion experiment
87 hours
Net time the lenses were worn in the 1897 experiment
Gestalt psychology
1910
Autumn and winter of Wertheimer's experiments in Frankfurt
Pavlov's dogs
1904
Year Pavlov won the Nobel Prize in Physiology or Medicine
The Milgram experiment
65 percent
Participants who went to the 450-volt maximum in the 1963 study
Optical illusions
1889
Year Müller-Lyer published his illusion