Automatic behavior or simple reflex is referred to as what?

The term "unconditioned response" refers to an automatic behavior or reflexive action that occurs in response to a stimulus without prior learning or conditioning. This response is innate and typically happens automatically; for example, a knee-jerk reaction when a doctor taps a patient's knee is an unconditioned response. This kind of reflex is not influenced by experiences or learned behavior, which distinguishes it from other types of responses.

In contrast, conditioned responses require prior learning through associations with specific stimuli, where a neutral stimulus becomes associated with an unconditioned stimulus to elicit a response. Operant responses involve behaviors that are influenced by rewards or punishments, while reinforced behaviors are those that have been shaped through reinforcement strategies. All of these contrasts highlight the automatic and innate nature of unconditioned responses, making it the correct term for describing simple reflexes.