If all participants in a repeated-measures study show roughly the same 10-point difference between treatments, then the data are likely to produce a significant value for the t statistic

Imagine you are a neurological researcher looking at a PET scan of a 16-year-old boy. Compared to the brain scan of an 8-year-old girl, you'd most likely see

a. increased frontal lobe. b. a larger cerebellum. c. decreased myelination. d. a smaller hypothalamus.

Peter is 13 and quite anxious. His parents are investigating treatment for him and are taking him to his family doctor for help. What treatment is the doctor likely to recommend for successful initial treatment?

a) Medication b) Watchful waiting c) Cognitive-behavioural therapy d) Physical activity