Dataview
LIST
FROM #Collection
WHERE file.name = this.Entry-For📗 -> 10/22/24: Experimental Design
🎤 Vocab
Word if Bomboclat
❗ Information
EEG Experiment Structure:
- Stimuli
- What is someone presented with / looking at
- # of trials
- How long are they looking
- How much data recorded
- Participants
- Who is looking
- Response
- What is someone doing during the exp
Literature Review
Find specifics surrounding experiment
- Timings
- Responses
- ERP Components
- Methods are in line with current research
Finding a good article
-
Peer reviewed
-
Reputable
- Google Scholar, PubMed, IEEE Xplore, Scopus, or JSTOR
-
Papers impact factor
-
Lean towards published recently
-
Sometimes other colleges neurotech are good resources
Clean Data
A good data collection protocol will save time. You won’t have to go back and repeatedly collect data to make your algorithms work.
Raw Data = signal + noise
Hansen’s axiom: “There is no substitute for good data”
“Increasing the number of trials eventually has diminishing returns because the effect of averaging on noise is not linearly proportional to the number of trials” (Luck, 2014)
- The noise decreases as a function of the square root of the number of trials in the average
Factors Affecting Electrical Measurement
Impedance: combo of resistance, capacitance, and inductance
- Skin, electrode gel, electrode can influence
Skin potential: tonic voltage between in-and-out of skin - Magnitude of this voltage changes with impedance
Sweat: Causes gradual shift
Remedies
-
Abrase (remove outer layer) of skin before placing elctrodes using Nuprep
-
Use fair amount of electrode gel
-
Use medical tape to stick electrodes to head or ear
-
Wash ur head
-
Keep from overlapping
- Minimize cable + electrode movement
-
Record from magnetically sound environments
- Avoid electronics when possible
-
Avoid reference interference
- Consult previous literature
Body Noise
Eyes are a strong dipole
- Corneas postively charged
- Retinas negatively charged
When someone blinks, the disruption of this field causes a large amount of noise
Give an ITI period for blinks (minimize participant mental weight to this task, its noise)
Temporalis muscle
- Limit neck movement, jaw clenches
Spatial Resolution
ICA isn’t entirely effective, because noise can be coming from deep, or surface level of brain. No idea where the source is.
✒️ -> Scratch Notes
- Log as you go through entry
🧪-> Example
- List examples of where entry contents can fit in a larger context
🔗 -> Links
Resources
- Put useful links here
Connections
- Link all related words