Table 1.

Ratings for each condition and each object type.

	Placebo Means (SD)	Naltrexone Means (SD)
A. Warmth ratings
Warm Pack	5.55 (0.85)	5.65 (0.98)
Neutral Object	2.94 (1.12)	3.06 (1.34)
Cold Pack	1.00 (0.00)	1.03 (0.18)
B. Coolness ratings
Warm Pack	1.35 (0.88)	1.16 (0.45)
Neutral Object	2.58 (1.54)	2.42 (1.36)
Cold Pack	6.77 (0.50)	6.65 (0.55)
C. Social connection ratings
Warm Pack	3.77 (1.91)	3.29 (1.94)
Neutral Object	2.68 (1.64)	2.90 (1.66)
Cold Pack	1.97 (1.47)	2.16 (1.61)
D. Positive affect ratings
Warm Pack	5.25 (1.20)	5.28 (1.15)
Neutral Object	4.42 (1.26)	4.72 (1.26)
Cold Pack	2.37 (1.23)	2.83 (1.50)