Final answer:
Extemporaneous speaking is prepared and practiced, presenting in a conversational style that permits audience interaction. Writing for delivery includes using visual aids, engaging vocal techniques, and practicing to improve fluency. For the central route to persuasion to be effective, the audience must be analytical and motivated.
Step-by-step explanation:
The type of speaking that involves preparation and practice, resulting in a conversational and interactive manner with the audience, is typically described as extemporaneous speaking.
This style contrasts with impromptu speaking, which involves little to no preparation, manuscript speaking, where the speaker reads from a written document, and memorized speaking, where the speaker recites a speech that has been committed to memory.
Extemporaneous speeches are planned and practiced, yet deliver a feeling of spontaneity and adaptability in their delivery, allowing for interaction with the audience.
It is important to consider various techniques when writing for delivery, like using visual and audio aids, demonstrating information through action, and engaging the audience using vocal techniques.
These techniques, along with good structuring of the content, are essential for maintaining the audience's attention, persuasiveness, and overall effectiveness of the speech. Practicing is fundamental to achieving fluency and reducing the use of verbal fillers such as 'um', 'ah', and 'like', which can be distracting.
Regarding the central route to persuasion, for it to be effective, the audience must be both analytical and motivated in processing the message presented to them.