Lab: Event Related Potentials

Question 1

Process of an event related potential

Answer 1

1. event occurs
2. specific electrical activity
3. patterns of change in electrical activity (ERP)

Question 2

4 attributes of an EEG trace

Answer 2

• frequency
• amplitude
• direction
• latency

Question 3

what is stimulus time-locking in an EEG?

Answer 3

The EEG is recorded at the same time for each stimulus presentation to trial (e.g. from 100ms before the stimulus is presented until a response is made).
These sections of EEgs are averaged so that we can eventually see the ERPS to our stimulus