In philosophy of mind and cognitive science, folk psychology, or commonsense psychology, is a human capacity to explain and predict the behavior and mental state of other people. Processes and items encountered in daily life such as pain, pleasure, excitement, and anxiety use common linguistic terms as opposed to technical or scientific jargon.
Traditionally, the study of folk psychology has focused on how everyday people—those without formal training in the various academic fields of science—go about attributing mental states. This domain has primarily been centred on intentional states reflective of an individual's beliefs and desires; each described in terms of everyday language and concepts such as "beliefs", "desires", "fear", and "hope".
When perceiving, explaining, or criticizing human behaviour, people distinguish between intentional and unintentional actions. An evaluation of an action as stemming from purposeful action or accidental circumstances is one of the key determinants in social interaction. Others are the environmental conditions or pre-cognitive matters. For example, a critical remark that is judged to be intentional on the part of the receiver of the message can be viewed as a hurtful insult. Conversely, if considered unintentional, the same remark may be dismissed and forgiven.
This folk concept of intentionality is used to distinguish between intentional and unintentional behaviour in sports where intentional fouls are punished more harshly than ones deemed to be unintentional. It is also applied in the legal system in terms of criminal law distinguishing between murder and manslaughter.
The importance of this concept transcends almost all aspects of everyday life: with empirical studies in social and developmental psychology exploring perceived intentionality's role as a mediator for aggression, relationship conflict, judgments of responsibility blame or punishment.
Recent empirical literature on folk psychology has shown that people's theories regarding intentional actions involve four distinct factors: beliefs, desires, causal histories, and enabling factors. Here, beliefs and desires represent the central variables responsible for the folk theories of intention.
Desires embody outcomes that an individual seeks, including those that are impossible to achieve. The key difference between desires and intentions is that desires can be purely hypothetical, whereas intentions specify an outcome that the individual is actually trying to bring to fruition.