Transcription-based studies have found that Korean-acquiring children master tense stops earliest among the three different types of homorganic stops (tense vs lax vs aspirated) despite its phonologically marked status. Tense stops in Korean have a short-lag VOT, so this finding is consistent with previous cross-linguistic research on order of acquisition of stop phonation types. However, Korean tense, lax, and aspirated stops are also differentiated by the fundamental frequency and the voice quality at the vocalic onset in addition to VOT. This study examined how correctly these multiple acoustic cues (VOT, f0, and H1-H2) predict the mastery pattern of Korean stops. The effect of these acoustic parameters on 20 Korean adult listeners’ assessments of children’s (aged 2–6) productions of /t′/, /t/, and /th/ was analyzed. Listeners were asked to label the stimuli as one of three stop categories and then to rate their goodness using visual analog scaling. Both categorical and gradient assessments of children’s stops were analyzed based on the three acoustic parameters in a mixed-effect regression model in order to quantify the relative effects of acoustic parameters on adult perception of phonation. [Work supported by NIDCD 02932 and NSF Grant 0729140.]