Twenty four children who stutter and those who do not (n = 12) participated in a dual-task study involving phoneme monitoring and tone judgement. The tone stimuli were presented at short or long stimulus onset asynchrony (SOA). The CWS were comparable to the control group in performing the monitoring task, although the SOA-based performance differences in this task were more variable in the CWS. The CWS were also significantly slower in making tone decisions at the short SOA and showed a trend for making more errors in this task. The findings are interpreted to suggest higher dual-task cost effects in CWS.