A) Investigate causational relationships between cognitive processes and brain activity
B) Investigate aspects of cognition that were previously impossible to observe directly, such as brain areas that are active for seen versus imagined stimuli
C) Record direct signals of neural activity for differing kinds of stimuli
D) All of the above

A) If a person is unable to sleep, it is impossible to achieve a resting state
B) Individuals that exercise regularly will have less difficulty in the "active" requirements
C) The brain is not truly "at rest" in the absence of an experimental task, since people are likely to be thinking of other things
D) What one person considers to be active, another may regard as restful

A) Electroencephalography EEG)
B) Magnetoencephalography MEG)
C) Magnetic resonance imaging MRI)
D) Lesion studies