What type of reinforcement schedule is it, when reinforcement is provided to the learner only after a certain number of responses ?

Question

Accepted Answer

The correct answer is Option 1: Fixed ratio. Here's why:

*   **Fixed Ratio (FR):** A fixed ratio schedule of reinforcement means that reinforcement is delivered after a *specific and unchanging* number of responses. For example, a rat might receive a food pellet after pressing a lever 5 times (FR-5). The question states reinforcement is provided "only after a certain number of responses," which directly aligns with the definition of a fixed ratio schedule. The "certain number" implies a set, unchanging number.

Now, let's explain why the other options are incorrect:

*   **Variable Ratio (VR):** A variable ratio schedule provides reinforcement after an *unpredictable* number of responses. The number of responses required for reinforcement varies around an average. For example, a slot machine pays out after an average of 20 pulls, but the actual number of pulls needed for a win can vary greatly. The question specifies "a certain number," which contradicts the variability inherent in a variable ratio schedule.

*   **Fixed Interval (FI):** A fixed interval schedule provides reinforcement for the *first response* after a *specific and unchanging* amount of time has passed. For example, if a rat receives a food pellet for the first lever press after 2 minutes have elapsed (FI-2 minutes), the time interval is fixed. The question focuses on the *number of responses*, not the passage of time, making fixed interval incorrect.

*   **Variable Interval (VI):** A variable interval schedule provides reinforcement for the *first response* after an *unpredictable* amount of time has passed. The time interval varies around an average. For example, checking your email might yield a new message after an average of 10 minutes, but the actual time between new emails varies. Again, the question focuses on the *number of responses*, not the passage of time, making variable interval incorrect. Also, it does not specify that the reinforcement is given for the *first response* after the interval.

Therefore, only the fixed ratio schedule directly matches the description in the question, where reinforcement is provided after a specific, unchanging number of responses.