. A hungry 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 peck's 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.

. A hungry 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 peck's went unrewarded, but the pigeon did not receive access to food unless it pecked the key. The pigeon is most likely on a VI(Variable Interval) schedule of reinforcement.

Explanation:

Variable-interval (VI) schedule :

A partial reinforcement that rewards the first correct response after an unpredictable amount of time. It produces slow and steady responses with little or no post-reinforcement pause (produces an overall low consistent rate of responding).

For example: I get a pellet of food on average every 5 minutes when I press the bar.

Hence, as in the given scenario, . A hungry 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 peck's went unrewarded, but the pigeon did not receive access to food unless it pecked the key. The pigeon is most likely on a VI(Variable Interval) schedule of reinforcement.

the 4th option is the answer