It is a nervous system outside the brain and the spinal cord
Not sure of what the answers are to select from but it should be something like non-stop excessive bleeding.
Variable ratio
Among the reinforcement schedules, variable ratio is the most productive and the most resistant to extinction. Fixed interval is the least productive and the easiest to extinguish (Figure 1).
Positive dis- play of student target behaviors at the conclusion of the project and academic school year
