Two phoneme monitoring experiments examined the influence of Transitional Probability (TP) on phoneme recognition. Target phonemes appeared at the end of Consonant-Vowel-Consonant (CVC) syllables, or as the first element of coda clusters in CVCC syllables. Reliable TP effects were found only for targets in CVCC syllables. The TPs both into and out of the targets influenced listeners' ability to detect them in CVCCs. Furthermore, targets were more difficult to detect in CVCCs than in CVCs. TP may only influence segment recognition when that segment is more difficult to recognise, as when it occurs in a cluster.