What concept does watching others access stimuli contingent upon a response best illustrate?

The concept that watching others access stimuli contingent upon a response best illustrates is observational pairing. This principle reflects the idea that individuals can learn and establish associations between their own responses and the consequences they observe others experiencing. In an observational learning scenario, when you watch someone else receive a reward or reinforcement for a specific behavior, it can create a mental connection that influences your own future behavior.

Observational pairing emphasizes the social aspect of learning by demonstrating how witnessing another's experience can enhance an individual's understanding of the relationship between actions and outcomes. This mechanism is crucial in settings where direct reinforcement may not be accessible; instead, individuals learn from the experiences of others.

While the other concepts have relevance in behavioral psychology, they do not specifically capture the learning process that involves observing and mimicking the responses of others in relation to stimulus access.