This study was designed as an explorative, descriptive, and observational/ experimental study. With a fluency oriented approach to quality, it aims at presenting and discussing the results of an experiment designed so as to explore the impact of sentence length and complexity on quality in Turkish-English SI. In addition, the self perceptions of interpreting students regarding their own interpreting performance obtained through postexperiment interviews will be discussed. In accordance with the objectives of the study, performance-related quality criteria rather than content-related quality criteria will be observed and fluency will be explored in terms of pauses, false starts, repairs, and repetitions.