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Judges selected from ISCC-NBS patches those colors which were most representative of red, yellow, green, and blue. These colors were presented for 1 min. each with GSR, heart rate, and respiration being recorded. There was a significant color effect on GSR but not on the other measures. Red was significantly more arousing than blue or yellow and green more than blue.
Jacobs et al. (Sat,) studied this question.