“…sure collection of a sufficient volume of saliva for acSaliva cortisol represents a simple and noninvasive measure that has greatly facilitated the study of the interactions among the hypothalamic-pituitaryadrenal (HPA) axis, environmental events, and behavior in the context of the study of health and development across the life span (e.g., Granger, Weisz, McCracken, Ikeda, & Douglas, 1996;Gunnar, Brodersen, Nachmias, & Buss, 1996;Gunnar, Marvinney, Isensee, & Fisch, 1989;Kagan, Reznick, & Snidman, 1987;Prkville, Susman, Zarit, Smyer, & Bosworth, 1996;Susman, Dorn, Inoff-Germain, Nottelman, & Chrousos, 1997). Salivary determinations of cortisol are made possible, in most instances, by means of slight modifications of commercially available radioimmunoassay (RIA) kits manufactured for use with serum (Al-Hakiem & Abbas, 1987;Kirschbaum, Strasburger, Jammers, & Hellhammer, 1989;Woolston, Gianfredi, Paugus, & Mason, 1983).…”