Error rate

From Pslc

The percentage of students that asked for a hint or were incorrect on their first attempt. For example, an error rate of 45% means that 45% of students asked for a hint or performed an incorrect action on their first attempt.

For each student on a each step, the error rate is computed as follows:

• If Incorrects = 0 or Hints = 0, the Error Rate = 0;
• If Incorrects > 0 or Hints > 0, the Error Rate = 1.

Both incorrect actions (errors or comission) and hint requests (errors of omission—the student did not know how to perform the step on his or her own) are considered errors.