single-time-point version J(A, = J(A, t, 23.2.1.1 Formalizing STI Using these definitions, one simple way to make the STI definition precise is: Mih nsh(A, t) = P(J(A, t, t + t shord 9 Sthreshoid) where Sth„shou demarcates the "attentional focus boundary." Which is a way of saying that we don't want t