Intention at the Interface

I identify and characterize the kind of personal-level control-structure that is most relevant for skilled action control, namely, what I call, “practical intention”. I differentiate between practical intentions and general intentions not in terms of their function or timing but in terms of their content. I also highlight a distinction between practical intentions and other control mechanisms that are required to explain skilled action. I’ll maintain that all intentions, general and practical, have the function specifying (and thus guiding according to those specifications), sustaining, and structuring action but that several functions that have been attributed to proximal intentions are actually implemented by other control mechanisms that are not themselves best identified as intentions. Specifically, I will claim that practical intentions do not initiate, monitor, specify or guide the fine-grained, online, kinematic aspects of action. Finally, I suggest that the way in which practical and general intentions should be differentiated is in terms of their content, where general intentions specify the overall goal, outcome, or end of an action as it is conceived of by the agent at a time, and practical intentions determine the means to that end. I conclude by providing empirical evidence to support this way of characterizing the intentions that “interface” with the mechanisms of motor control. Though this discussion has repercussions for action in general, I will limit my discussion to cases of skill.