Naive psychology; Belief-desire psychology ; Representation (of causality) ; Causality (notion of) ; Introspection (method.) ; Selbstbeobachtung (method.) ; Phänomenographie ; Explanation (philosophy of science) ; Causation (philosophy of science) ; Causality (philosophy of science) ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development