An activity theory approach to affordance

The concept of affordance was introduced to the field of HCI as a means to enhance the understandability and usability of artifacts and especially their user interface. The results have however not been entirely convincing. This paper presents a theoretical analysis of the concept of affordance coined by James J. Gibson. The concept of affordance was meant to cut through the subjective-objective dichotomy of traditional psychology and philosophy, but its interpretation in HCI has often retained this dichotomy. We argue, that at least some of the misunderstanding of the concept is caused by the fact that Gibson focused mainly on the perceptual side of the concept, leaving the activity of the organism as a largely implicit precondition. We suggest that this shortcoming have significant consequences, but that they can be overcome by employing the concepts for activity and consciousness found in the Russian activity theory as a frame of reference for the concept of affordance.