One of the main positions in the contemporary debate on joint attention is John Campbell’s relationalist account. This account has been welcomed as extremely promising in some strands of philosophy and cognitive science, but it has recently been subject to renewed criticism. In this paper, I take a sympathetic approach toward Campbell’s relationalism and I provide support for it by means of a naturalistic theory of the individuation of joint-attentional states. I start from examining some recent objections raised against Campbell’s (...) account. I suggest that, although these objections do not undermine the account, they point to questions that current relationalism leaves unanswered. Specifically, current relationalism does not provide an explanation of the psychological processes through which a joint-attentional experience is individuated, i.e., assembled and experienced, in such a way that it can constitute an immediate justification for a coordinated action. I propose that such an explanation can be found in a phenomenological-interactionist approach to shared intentionality. (shrink)