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GATE 2026 XH5 (Psychology) – Question 28

Biological and Evolutionary Basis of Behaviour · Methods of Physiological Psychology: Invasive (anatomical, degeneration, lesion, chemical, microelectrode) and non-invasive (EEG, scanning) methods · 1 mark · Multiple choice

EEG is a record of the electrical activities of nerve cells. The range of frequencies of EEG is _____ Hz.

  1. 1 - 50
  2. 1 - 20
  3. 1 - 10
  4. 1 - 3

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Correct answer: (A) 1 - 50

Explanation

The electroencephalogram records brain waves that run from the slow delta waves (about 1 to 4 Hz) through theta, alpha and beta to the faster gamma activity, so the usual recorded range is roughly 1 to 50 Hz. The other ranges are only sub-bands of this.