Glossary » power law of practice
power law of practice
an expression of time to perform a task based on practice trials, saying that people improve in speed at a decaying exponential rate.
Tn = T1 n-a, a ~ 0.4
Tn = the time to perform a task after n trials.
T1 = the time to perform a task in the first trial.
n = the number of trials.
Cognitive modeling approaches such as GOMS apply this to making predictions of human performance.