Salivary Response to Lemon Juice as a Measure of Introversion in Children

Abstract
The relationship between introversion, as measured by the Junior Eysenck Personality Inventory, and salivation to lemon juice was examined with 10 boys and 10 girls at CA 8, 10, and 12. Boys salivated significantly more than girls to lemon juice stimulation ( P < .05), but comparable sex differences also occurred in salivation to water by control Ss. Introversion correlated .43 ( P < .01) with salivation for all 25 girls but not for boys (r = .19). Ss who were in the upper third of the total group on extraversion showed significantly less salivation to lemon juice than did Ss in the lower third ( P < .025), which is consistent with Eysenck's theoretical analysis.

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