Which aspect is NOT considered when evaluating true fluency in speaking?

Evaluating true fluency in speaking focuses on several critical aspects that contribute to effective communication. One important element is vocal variation, which involves the ability to modulate tone, pitch, and volume to enhance engagement and emphasize meaning. Grammatical accuracy is also a key factor, as it ensures the speaker's message is clear and coherent, adhering to the rules of the language. Appropriate speed, or the pace at which someone speaks, affects the audience’s comprehension and retention of the spoken message; speaking too quickly or too slowly can hinder understanding.

While presentation style can influence how a message is received, it is less about the fluency of the speech itself and more about the overall delivery technique. Therefore, it is not core to the evaluation of speaking fluency but rather relates to aspects such as body language and visual aids, which can complement a presentation but do not directly measure one's fluency in the language.