The body of research and frameworks that represents our current best understanding of how animals and humans acquire, modify, and retain behaviours through experience.

Learning theory is not a fixed set of facts but a developing field. The major frameworks in current use include operant conditioning (learning through the consequences of behaviour), classical conditioning (learning by associating stimuli), habituation and sensitisation (changes in responsiveness to repeated stimuli), and a range of related processes. Each of these has its own substantial research base, its own contested questions, and its own ongoing development.

The picture has continued to evolve as research methods improve and as findings from neuroscience, cognitive science, and affective science feed back into behavioural models. The Skinner-era behaviourism of the mid-twentieth century gave way to the cognitive revolution from the 1960s onwards, which in turn has been supplemented by contemporary work on affect, emotion, and welfare. None of the older frameworks has been entirely discarded; rather, the picture has become richer and more nuanced.

For trainers, handlers, and educators across species, learning theory provides the conceptual tools to understand why an animal responds the way they do, why a particular training intervention works (or does not), and how to construct training that is both effective and welfare-positive. It is the foundation of modern dog training, zoo husbandry training, equitation science, and applied animal behaviour work more broadly.

Like any developing scientific field, learning theory remains open to revision as new research lands.