Study  Details 
Error Rate

Katz & Anderson [19871988]  69 students who knew LISP reasonably well. Probability of an error in a LISP production if the student did the production successfully the previous time. 
3%

Katz & Anderson [19871988]  69 students who knew LISP reasonably well. Probability of an error in a LISP production if the student did the production unsuccessfully the previous time. 
22%
