Fixed-Interval vs Variable-Interval: What's the Difference?

📚 Understanding Fixed-Interval Schedules

A fixed-interval schedule is a type of reinforcement schedule where a reward is given after a specific amount of time has passed. Think of it like a weekly paycheck – you get paid every week, regardless of how much work you did that week (within reason, of course!).

• 📅 Definition: ⏳ Reinforcement is given after a fixed amount of time.
• 📈 Response Rate: 🐌 Typically produces a scallop-shaped response pattern. This means there's a pause after the reinforcement, followed by an increase in responding as the time for the next reinforcement approaches.
• 🍕 Example: Getting pizza delivered every Friday night, no matter what!

🧠 Understanding Variable-Interval Schedules

Now, a variable-interval schedule is a bit more unpredictable. In this case, reinforcement is given after an unpredictable amount of time has passed. It's like checking your email – you never know exactly when you'll get a new message, so you check it periodically throughout the day.

• 📅 Definition: ⏳ Reinforcement is given after a variable amount of time.
• 📈 Response Rate: steady response rate. 🐢 Since the reinforcement is unpredictable, there's less of a pause after reinforcement and a more consistent level of responding.
• 📧 Example: Getting email notifications at random times throughout the day.

🆚 Fixed-Interval vs. Variable-Interval: The Key Differences

🔑 Key Takeaways

• 🎯 Predictability: Fixed-interval schedules are predictable, while variable-interval schedules are not.
• 📈 Response Rate: Fixed-interval schedules produce a scallop-shaped response, while variable-interval schedules produce a steady response.
• ⏳ Extinction: Variable-interval schedules are more resistant to extinction than fixed-interval schedules.