Physiological and psycho logical measurements of emotional state using various types of video content during TV viewing

Using 42-inch plasma screens and showing four kinds of content, we experimentally evaluated the relationship between TV viewers' emotional state and selected physiological and psychological indices. Our results indicated that near-infrared spectroscopy (NIRS) and low frequency/high frequency ratio (LF/HF), representing nervous system activities, are potentially useful indices for evaluating emotional states that include “stressed - relaxed,” “comfortable - uncomfortable,” and “like - dislike.” Moreover, LF/HF and HR are affected by the complex emotional states of each participant.