Final answer:
Ineffective approaches in achieving speech intelligibility include techniques with weak support, insufficient evidence, or complicated methods that make understanding difficult.
Step-by-step explanation:
Approaches that are likely to be ineffective in helping clients achieve speech intelligibility include methods where the composer's position or claim is weakly supported. This happens when evidence is either insufficient or irrelevant.
Furthermore, when ideas and media used are not effective for the intended purpose or fail to engage the client, the outcomes can be compromised. Speech therapy techniques that rely on linguistic, visual, or multimedia transitions could also be ineffective if they are uncoordinated or do not enhance understanding.
The most notable factor contributing to ineffectiveness is when teachings become so complex or derivative that they render communication unintelligible. This contradicts the fundamental objective of speech therapy, which is to make speech clear and understandable.