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Linguistic factors influence the likelihood of occurrence of stuttering instances on a certain word within an utterance. However, studies on the relationship between stuttering instances and linguistic factors of Turkish-speaking individuals are scarce. This study aimed to determine the syllable- and word-based measures of stuttering speech samples of Turkish-speaking school-aged children who stutter. Stuttering-like disfluencies (SLDs) and lexical categories were identified after transcription of 61 children's spontaneous speech samples (age range = 6–16). Syllable-, word- and utterance-level measures were employed. Syllable-based and word-based stuttering frequency findings were significantly different (p <.001); SLDs were more likely to occur at the utterance-initial (p <.001) and word-initial (p <.001) positions; content words were more likely to be stuttered and, there was a relation between the occurrence of SLDs and utterance length (p =.001). Since there is great variability between word-based and syllable-based measures, and SLDs tend to occur at word onsets, using word-based measures in Turkish would provide a measure of stuttering frequency that is comparable to the literature. Moreover, findings support that phrases requiring greater demands on utterance planning increase the possibility of occurrence of stuttering instances. [ABSTRACT FROM AUTHOR]