In a series of twenty intervals, John bites his nails the following number of times: 2, 0, 1, 2, 0, 1, 1, 1, 0, 1, 0, 2, 1, 1, 1, 2, 2, 1, 1, 0. Using an interval recording procedure, the overall level of nail-biting calculated is
A) 1%.
B) 20%.
C) 100%.
D) 75%.

Question

Quizplus · Accepted Answer

The overall level of nail-biting is calculated by dividing the number of intervals in which the behavior occurred by the total number of intervals, then multiplying by 100 to get a percentage. In this case, nail-biting occurred in 15 out of 20 intervals (75%).

In a Series of Twenty Intervals, John Bites His Nails