Functional Magnetic Resonance Imaging (FMRI) Is Based on a Measurement

question 17

Multiple Choice

Functional magnetic resonance imaging (fMRI) is based on a measurement of

• A)magnetic fields emanating from the surface of the brain.
• B)the distribution of dye in the arteries and veins of the brain.
• C)virtual lesions following intense magnetic stimulation of the brain.
• D)ratios of oxygenated to deoxygenated hemoglobin in the brain.

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Definitions:

Test Statistic

A standardized value calculated from sample data during a hypothesis test that is used to make a decision about the null hypothesis.

P-value

The probability of obtaining test results at least as extreme as the ones observed during the test, assuming the null hypothesis is true.

Test Statistic

This is a value, derived from sample data, used in hypothesis testing to determine whether to reject the null hypothesis.

Null Hypothesis

The theory suggesting that any noted discrepancies between certain groups are merely the result of sampling or experimental inaccuracies, asserting no substantial variance exists.