In most PET and functional MRI studies of cognitive processes, the signal-to-noise ratio is increased by
A) subtraction.
B) addition.
C) averaging.
D) signal splitting.
E) multiplication.

Question

Quizplus · Accepted Answer

Averaging is the process of adding multiple measurements together and dividing by the number of measurements to reduce the impact of random noise on the signal. This increases the signal-to-noise ratio and improves the reliability and accuracy of the results. Subtraction, addition, signal splitting, and multiplication are not commonly used methods of increasing the signal-to-noise ratio in PET and functional MRI studies of cognitive processes.

In Most PET and Functional MRI Studies of Cognitive Processes