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

Question

Quizplus · Accepted Answer

Signal averaging is the process by which multiple scans or trials are averaged together to improve the signal-to-noise ratio. This technique reduces random noise while maintaining the underlying signal, thus increasing the reliability of the measurements. Subtraction, addition, signal splitting, and multiplication are not typically employed to increase the signal-to-noise ratio in cognitive neuroscience studies.

In Most PET and Functional MRI Studies of Cognitive Processes,the