Final answer:
The research approach by Dr. U is the least like a cognitive psychology research question as it focuses on the biological aspects rather than mental processes typical of cognitive psychology.
Step-by-step explanation:
The research approach that least resembles a research question grounded in cognitive psychology is the one proposed by Dr. U, who uses an experimental medication to see how parietal lobe activation changes in patients diagnosed with Alzheimer's disease. This approach is less about understanding cognitive processes in the traditional sense and more aligned with the biological aspects of psychology and medical treatment effects, potentially fitting within biopsychology or neurology. Cognitive psychology focuses on processes such as attention, problem-solving, memory, and language. Therefore, research by Dr. U diverges from the typical themes of cognitive psychology, which involve exploring mental processes rather than biological interventions.