brain processed info as electrical activity in action potential or nerve impulses
EEG Method?
measures electrical activity. there are 4 types of EEG patterns: alpha waves, beta waves, theta waves and delta waves
Event- Related Potential (ERP)?
electrodes attached to the scalp. stimulus presented to a ppts and researcher looks for activity- related stimulus, many times and then average response graphed.
ERP?
short latency. (latency- time b/w the presentation of stimulus and response). occurs in 100 milliseconds.
types of response?
wave- sensory ERP reflect sensory ERPs. ERP that occur after 100 milliseconds are cognitive ERPS as they demonstrate information processing
Non-invasive?
both are non-invasive, much cheaper allows ppts to undergoe EEG/ERP
Spatial Resolution?
poor spatial resolution- harder to detect activity in superficial areas of the brain. spatial resolution of 1-2 mm.
Temporal resolution?
good temporal resolution takes readings every millisecond can record data in real time.
weakness?
EEG if often detected in several regions of the brain simultaneously. can be difficult to pinpoint regions/areas.
ERP strength?
enable to determine how processing is affected by as specific experimental manipulation.
