Two-alternative Forced Choice
Two-alternative forced choice (2AFC) (and the variant Two-interval forced choice (2IFC)) Task is a psychophysical method for eliciting responses from a person about his or her experiences of a stimulus. Specifically, the 2AFC experimental design is commonly used to test speed and accuracy of choices between two alternatives given a timed interval. It has been developed by Gustav Theodor Fechner. The task is an established controlled measure of choice and is widely used to test a range of choice behaviors in animals and in humans. The basic components of a 2AFC task are 1) two alternative choices presented simultaneously (e.g two visual stimuli), 2) a delay interval to allow a response/choice, 3) a response indicating choice of one of the stimuli.
Read more about Two-alternative Forced Choice: Behavioral Experiments With 2AFC, Computational Models of Decision Making in 2AFC
Famous quotes containing the words forced and/or choice:
“...the power-loving temperament is more dangerous when it either prefers or is forced to operate in what is materially a void. We have everything to dread from the dispossessed.”
—Elizabeth Bowen (1899–1973)
“Those craning birds are choice for you, songs that jump back
To the built voice, or fly with winter to the bells,
But do not travel down dumb wind like prodigals.”
—Dylan Thomas (1914–1953)