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. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: Psychopharmacology (Berl). 2012 Jan 7;222(1):71–80. doi: 10.1007/s00213-011-2624-6

Table 2.

Means and effect sizes for the main effects of instruction condition and beverage condition on drink ratings and time to choosing to smoke

Told Received

Placebo Alcohol Placebo Alcohol

M (SD) M (SD) Effect size M (SD) M (SD) Effect size
Est. number of drinks 0.75 (1.47) 2.17 (1.03) .25*** 1.23 (1.31) 1.71 (1.55) .04
Smell 1.28 (1.17) 1.53 (1.24) .01 1.35 (1.21) 1.47 (1.21) .002
Satisfaction 1.15 (1.23) 1.69 (1.31) .05* 1.35 (1.38) 1.50 (1.22) .004
Made me feel better .79 (1.14) 1.31 (1.03) .06* .98 (1.16) 1.13 (1.06) .01
Liking 1.15 (1.23) 1.61 (1.24) .04 1.23 (1.23) 1.54 (1.27) .02
Similar to usual .53 (.95) .76 (1.23) .01 .52 (.95) .77 (1.24) .01
Taste 1.28 (1.33) 1.67 (1.44) .02 1.29 (1.38) 1.67 (1.39) .02
Potency 1.33 (.79) 2.22 (1.09) .19*** 1.63 (1.06) 1.96 (1.02) .03
Time to smoke 23.39 (22.55) 20.74 (22.02) .004 24.76 (22.54) 19.32 (21.75) .015

Note. Estimated number of standard drinks (rated on a scale from 0 to 6 drinks in half increments and converted to whole drinks in the table). Potency rated on a 5-point scale (0 = “much weaker” to 4 = “much stronger”). Other drink ratings completed on a 5-point scale (0 = “not at all” to 4 = “extremely”). Time to smoke indicates the mean number of minutes to choosing to smoke a cigarette during the 50-minute delay period with those not smoking set to the maximum of 50 minutes. Tests of the effect of sex on these variables were nonsignificant as were sex × condition interactions.

a

Effect size is indicated as partial η 2 of the main effects from two-way (Told × Received) analyses of variance.

*

p < .05;

**

p < .01;

***

p < .001.