erp

• uses statistical programmes to isolate specific patterns of brain activity. all extraneous data from original eeg filtered out leading to response to stimuli
• +much more specific than eeg to the measurement of neural processes that could be achieved through eeg data. has high temporal resolution means that it shows real time activity. as a result of this it is often used to measure cognitive functions and deficits.
• -lack of standardisation in the methodology between different research studies therefore difficult to confirm the findings. also extraneous variables such as background noise can interfere with the results, and is difficult to control