Complex sentence: Conditioning is the common psychological term for what Pavlov (1927) described as the development of "conditional" behavior, or the learning in which the behavior of organisms (what people and animals do and how they react to things) is changed by experience.
Split into simpler sentences: Conditioning is the common psychological term for what Pavlov (1927) described as the development of "conditional" behavior. It refers to a kind of learning in which the behavior of organisms (what people and animals do and how they react to things) is changed by experience.