What is a fundamental characteristic of a continuous schedule of reinforcement?

A continuous schedule of reinforcement involves providing a reward for every single occurrence of a desired behavior. This means that every time the behavior is performed, the individual receives reinforcement, which could be anything from praise to a tangible reward. This consistent application of reinforcement makes the behavior more likely to be repeated, as the individual quickly learns that their actions yield predictable and immediate results.

In contrast, the other answer choices describe scenarios that do not align with the principles of a continuous schedule. For instance, if responses are sometimes ignored or only rewarded under certain conditions, that would denote intermittent or partial reinforcement schedules rather than a continuous one. Similarly, if all behaviors went unreinforced, there would be no reinforcement occurring at all, which contradicts the definition of a continuous schedule where every response is rewarded. Thus, the characteristic of always rewarding responses distinctly defines a continuous schedule of reinforcement.