Let β > 1 be a real number and define the β-transformation on [0, 1] by T β : x → βx mod 1. Further, definefor infinitely many n} andfor infinitely many n}, where Ψ : N → R >0 is a positive function such that Ψ(n) → 0 as n → ∞. In this paper, we show that each of the above sets obeys a Jarník-type dichotomy, that is, the generalised Hausdorff measure is either zero or full depending upon the convergence or divergence of a certain series. This work completes the metrical theory of these sets.