Ahungry pigeon is in a skinner box and is pecking a key for access to food. the first food delivery occurs for the first peck after 1 minute has elapsed. the second occurs for the first peck after 3 minutes has elapsed. the third food delivery occurs for the first peck after 2 minutes has elapsed. all other pecks went unrewarded, but the pigeon did not receive access to food unless it pecked the key. the pigeon is most likely on a schedule of reinforcement.
fr
vr
fi
vi

VI        

Explanation:

The reinforcement schedules are of four types:

1. Fixed ratio schedule.

2. Fixed interval schedule.

3. Variable ratio schedule.

4. Variable interval schedule.

Variable interval schedule or VI: This is one of the reinforcement schedules in operant conditioning in which a response gets reinforcement after a specific and unpredictable time and the time is changing.

In the question above, the pigeon is most likely on a variable interval schedule of reinforcement.

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explanation:

it's the under parts of the car