A second-occurrence (SO) focus is the semantic focus of a focus-sensitive operator (e.g. only), but is a repeat of anearlier focused occurrence. We report onthe first systematic productionan d perception experiments to show that SO foci occurring after a nuclear accent are, as Rooth (1996b) has claimed, prosodically marked. We find that (i) there is no mean pitch rise on SO foci, (ii) SO foci are marked by longer duration and greater energy, and (iii) listeners are able to detect the difference between SO foci and nonfoci. On the basis of these results, we argue that SO focus is compatible with theories of focus interpretationthat it has beenclaimed to contradict.