A joint action is a basic joint action in an instrumental sense if two (or more) agents perform the joint action without performing some other joint action. Intentional joint attention (iJA) is a basic joint action in an instrumental sense. Intentional joint attention is a real interactional process (not a theoretical entity or mere abstraction from some more complex action) in which we engage with others. Insofar as iJA involves (1) a common goal involving we-intentions, (2) common knowledge of intending that goal, and (3) participation in cooperative behavior patterns in order to achieve this goal, it is a joint action.
Furthermore, on analysis, the components of iJA are not themselves other joint actions (but rather more subtle components of interaction—those that involve shared attention or the various individual actions that constitute the required coordination). Hence iJA is a basic joint action, and in many cases of more complex joint action, it operates as such, including complex joint final-goal actions (where agents coordinate their behavior in order to achieve an end-product or end-state) and complex joint path-goal actions (where agents coordinate their behavior as an end in itself) (Fiebich and Gallagher 2013).