Two-alternative forced-choice task
= Two-alternative forced-choice task
{title2=2AFC}
= 2AFC
{c}
{synonym}
= Two-alternative forced-choice
{synonym}
A task requiring selection between two specified alternatives, such as which of two intervals contained a signal. For balanced alternatives and no usable information, expected correct performance is one half. Its decision assumptions and possible response biases must still be specified; forced choice does not remove every source of bias.