James, who has been diagnosed with schizophrenia, believes he is being controlled by others through a radio that has been inserted into his brain. James is exhibiting which type of symptoms?

Four of Schaie's five primary abilities increase from age 20 to age 50

Indicate whether this statement is true or false.

Which of the following categories involves claims that are always untestable?

A) Metaphysics B) Pseudoscience C) Science D) Popular psychology