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'''Enactive interfaces''' are interactive systems that allow organization and transmission of knowledge obtained through action. Examples are interfaces that couple a human with a machine to do things usually done unaided, such as shaping a three-dimensional object using multiple modality interactions with a database,<ref name=Fukuda/> or using interactive video to allow a student to visually engage with mathematical concepts.<ref name=Held/> Enactive interface design can be approached through the idea of raising awareness of [[affordances]], that is, optimization of the awareness of possible actions available to someone using the enactive interface.<ref name=Stoffregen/> This optimization involves visibility, affordance, and feedback.<ref name=Stone/><ref name=Zudilova/>
The enactive interface in the figure interprets manual input and provides a response in perceptual terms in the form of images, sounds, and [[haptic technology|haptic (tactile) feedback]]. The system is called enactive because of the feedback loop in which the system response is decided by the user input, and the user input is driven by the perceived system responses.<ref name=Bordegoni/>
Enactive interfaces are new types of [[Human–computer interaction|human-computer interface]] that express and transmit the enactive knowledge by integrating different sensory aspects. The driving concept of enactive interfaces is then the fundamental role of motor action for storing and acquiring knowledge (action driven interfaces). Enactive interfaces are then capable of conveying and understanding gestures of the user, in order to provide an adequate response in perceptual terms. Enactive interfaces can be considered a new step in the development of the human-computer interaction because they are characterized by a closed loop between the natural gestures of the user (efferent component of the system) and the perceptual modalities activated (afferent component). Enactive interfaces can be conceived to exploit this direct loop and the capability of recognizing complex gestures.
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