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Wheeldon & Lahiri reported that speech initiation time (RT) was influenced by the phonological complexity of the initial prosodic word (PWd) in an immediate-production task, but by the number of PWds in a delayed-production task that enabled preplanning. Thus, different tasks are sensitive to different types of complexity. The current study explored RT for different complexity types: number of syllables in the PWd (monosyllabic vs disyllabic), location of a complex PWd (early vs late), and number of PWds (3 vs. 4 vs. 5) using a reading aloud task. The presence of a disyllabic noun increased RT only in 4-PWd sentences, where the syntactic complexity of the SUBJECT and OBJECT NPs differed. This suggests that RT may increase in the absence of parallel syntactic structures in SUBJECT and OBJECT position, highlighting the need for further research on the role of complexity at different levels in the speech planning process.