A pigeon must circle continuously for an average of 10 seconds in order to earn access to food. This ...

A pigeon must circle continuously for an average of 10 seconds in order to earn access to food. This is an example of a _____ schedule.
 
  A) variable time
  B) variable interval
  C) variable ratio
  D) variable duration

---

Question 2

A rat must press a lever continuously for 10 minutes to earn a pellet of food. This is an example of a _____ schedule.
 
  A) fixed interval
  B) fixed ratio
  C) fixed duration
  D) fixed time

---

Question 3

In general, _____ schedules produce higher rates of response than _____ schedules.
 
  A) VI; VR
  B) FI; VI
  C) FR; FI
  D) FR; FI

---

Question 4

On a(n) _____ type of schedule, the attainment of one reinforcer means that the next reinforcer is necessarily some distance away.
 
  A) fixed
  B) variable
  C) interval
  D) ratio