Final answer:
The communication technique to avoid when speaking with a patient who has dementia is using complex medical terminology. Simple and direct language, written instructions, and speaking both loudly and slowly are beneficial in ensuring clear communication with dementia patients.
Step-by-step explanation:
When communicating with a patient who has dementia, the communication technique you should NOT use is d. Use complex medical terminology. Patients with dementia often have difficulty understanding and processing information. Therefore, it's vital to use simple and direct language to ensure that the patient can comprehend your message. Additionally, it may be helpful to provide written instructions as they can be a useful reference for the patient if they forget what was said. While speaking, make sure to do so in a manner that is loud enough and slow enough for the patient to hear and process without becoming overwhelmed or confused. However, avoid using specific terms or jargon that can create confusion or further complicate the communication process.