EEG Flashcards
1
Q
What are the advantages of EEG?
A
- High temporal resolution
- Non-invasive, few exclusion criteria
- Portable
- Relatively cheap
2
Q
What method is used to placed the electrodes on the head?
A
The 10-20 system
3
Q
What kind of artefacts can corrupt the data?
A
Blinks, movements, muscle activity, eye movements
4
Q
How does pre-processing clean the raw data?
A
By:
- Subtracting systematic artefacts (blinks)
- Filtering irrelevant frequencies
- Rejecting data with unsystematic artefacts
5
Q
What are the components of the event related potential (ERP)?
A
- Early, exogenous - reflect mostly sensory responses
* Later, endogenous - reflect mostly internal, higher order processing
6
Q
What is the common experimental design for EEG?
A
- Compare two conditions that differ only by a variable of interest X
- Observe ERPs for both conditions
- Differences in ERPs reflect effect of X.
7
Q
What are the possible confounds in a EEG experiment?
A
- Physical stimulus properties
- Task difficulty
- Response requirements
- Number of trials per condition
- Order of tasks
