Psychology I / Operant Conditioning
Practice question · Match the pairs

Match each real-world example to the reinforcement schedule it illustrates.

  • Slot machines paying out after an unpredictable number of plays
  • Piecework pay: money after every set number of items made
  • A weekly paycheck arriving after a set amount of time
  • Checking a messaging app that updates at unpredictable times
  • Fixed ratio
  • Variable interval
  • Fixed interval
  • Variable ratio
Hints
  1. Ratio schedules count RESPONSES; interval schedules count TIME. Fixed is predictable; variable is not.
  2. Slot machines are the signature variable-ratio case; a weekly paycheck is fixed-interval.
Show the answer
  • Slot machines paying out after an unpredictable number of plays Variable ratio
  • Piecework pay: money after every set number of items made Fixed ratio
  • A weekly paycheck arriving after a set amount of time Fixed interval
  • Checking a messaging app that updates at unpredictable times Variable interval
Why

Slot machines are variable ratio (unpredictable number of responses), piecework is fixed ratio, a weekly paycheck is fixed interval, and app-checking is variable interval. Ratio vs interval is responses vs time; fixed vs variable is predictable vs not.

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