Understanding coexistence of internal states in children and adults

We investigated the conceptualization of suffering and well-being states pertaining to physical and psychological domains by examining children's and adults’ acceptance of coexistence of two co-occurring internal states. Children and adults decided whether pairs of states may coexist, justified their answers, and reported whether they had personal experience of that. The pairs of states could involve same valence and different domain, different valence and different domain, and different valence and same domain. The results showed that acceptance, plausibility, complexity, and causality of justifications vary depending on age and/or type of state co-occurrence. The role of factors like cognitive processing, personal experience, and asymmetric organization of the constructs of valence and domain is discussed, in light of the applied relevance of the findings.