Separate causality, correlation, and interaction in behaviour evidence

Psychology SL stimulus: In Dunedin, boarding students are involved in a school well-being project before supervised study. The focus is a guided breathing routine and stress before evening study. Evidence says students report lower stress after the routine, but homework completion changes little. The method uses stress ratings, study logs, and supervisor observations with 96 participants over 4 weeks. A teacher wants to say the first factor caused the behaviour. Use the causality reasoning path before separating causality, correlation, and interaction. Select the psychology concept, content link, context application, and evaluation limit. Then answer this in your own words: how would this route improve the Psychology SL response for this exact context? AI will analyse your reasoning, evidence use, concept-content-context link, method or ethics judgement, and expression.