NORMAL CIRCADIAN VARIATIONS IN BODY TEMPERATURE WERE USED TO TEST H. HOAGLAND'S (SEE 8:6) CONCLUSION, BASED ON ARTIFICIAL TEMPERATURE VARIATIONS, ABOUT THE EFFECT OF BODY TEMPERATURE ON TIME JUDGMENTS IN 10 MALE UNDERGRADUATES. SS PRODUCED INSTRUCTED TIME INTERVALS FASTER (METHOD OF PRODUCTION) AND OVERESTIMATED THE LENGTH OF PRESENTED TIME INTERVALS (METHOD OF ESTIMATION) DURING THE AFTERNOON, WHEN THEIR BODY TEMPERATURE WAS HIGHEST. THESE CORRELATIONS OF TIME JUDGMENTS WITH NORMAL CIRCADIAN TEMPERATURE VARIATIONS SUPPORT HOAGLAND'S CONCLUSION THAT SUBJECTIVE TIME JUDGMENT DEPENDS PARTLY ON AN INTERNAL "CLOCK" WHICH ACCELERATES WHEN BODY TEMPERATURE IS RAISED. (PsycINFO Database Record (c) 2006 APA, all rights reserved)