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🎤 Vocab
Word was bluefish
❗ Information
Invest time in proper experimental data
- Bad design can mislead and lead to results impossible to interpret
- Quote:
Perhaps the decisive factor is fanatical care beyond the obvious stuff: the obsessive attention to details that are often overlooked
✒️ -> Scratch Notes
Electrode Placement
- International 10/20 System for electrode placement
- When an electrode cap is not available, we can measure distance from nasion and inion to find exact placements
- Focus electrodes on areas on interest if limited
- Naming is based on the lobe it is placed on
- Frontal, Parietal, Occipital, …
Experimental Design
Use PsychoPy
- Guide on the wiki
Explicitly define stimulus, make repeatable
Stimuli
Hillyard Principles - REsponses should be compared to the same physical stimuli while holding overall arousal level and task demands constant
- Only one manipulation
Stimuli Habituation - Repeated application of stimulus leads to decreased response - Allow for breaks
- Decreased frequency of presentation
Event Codes
- “Sophisticated ERP experiments often involve complex sequences of events (simuli, responses, EMG bursts, eye movements)” - ERPLAB wiki
- For each of these events, we create an event code that describes the time of occurence for some event during recording
SOA and ITI
SOA (Stimuus Onset ASynchrony): Tie between the onset of one stimulus to the onset of the next stimulus
ITI (inter-trial interval): Time between two trials
Timing
- Determines SOA and ITI length
- Trade off between short / long SOA
- Long experiments-> Fatigue / Noise
- Short trials-> Overlap / Offset Response
- Trade off between short / long SOA
- Implement breaks
- Include a baseline recording period
Epoching
Used for ERP experiments
- Converiting continuous EEG to time-locked segments that correspond to your events
- Epochs are then average into bins, so we can identify patterns in our neural data in reponse to events
Types:
- Stimulation based epoching
- Time based epoching
Project Proposal:
Enough detail that someone with no familiaritty is able to recreate it
- Description of stimuli
- Number of trials (timing of trials)
- How to implement with EEG (electrode placement)
🧪-> Example
- List examples of where entry contents can fit in a larger context
🔗 -> Links
Resources
- Put useful links here
Connections
- Link all related words