Which of the following is a core behavior of stuttering?

Prolongation is recognized as a core behavior of stuttering. This specific behavior occurs when a person extends the duration of a speech sound, which can be a result of the struggle to produce words fluently. It represents a clear disruption in the flow of speech, and understanding this behavior is critical in identifying and addressing stuttering.

Prolongation is often observed as part of the stuttering experience alongside other core behaviors like blocks and repetitions. These behaviors are central to the definition of stuttering because they directly impact the fluent production of speech.

In contrast, while eye blinking and learning avoidance techniques can be associated with stuttering, they are not core behaviors themselves; rather, they may emerge as secondary characteristics as individuals adapt to their stuttering. Negative feelings can also be a consequence of stuttering but do not constitute a direct disruption in speech. Recognizing prolongation as a core behavior emphasizes its role in the mechanics of stuttering and the challenges faced by those who stutter.