EEGs are mostly used to inform affective scientists about which areas of the brain positive and negative emotions are likely to occur in. 

Alma College

Measures the changes in electrical potentials of groups of neurons through an electrode headcap.

Electroencephalography (EEG)

Niedenthal, P. M., & Ric, F. (2017). Psychology of Emotion (2nd ed.). Psychology Press.

Psychology of Emotion

Electroencephalography's Purpose in Emotions Research 

Electroencephalography (EEG)’s measure electrical impulses in the brain. For ASMR experiencers and non-experiencers, watching ASMR decreased theta power, and increased beta power.

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