Table 6.
Post-Experiment Expectancy Manipulation Checks
| Alcohol | Placebo | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | SD | Med | IQR | R | #0 | %0 | M | SD | Med | IQR | R | #0 | %0 | |
| Subjective intoxication immediately after beverage consumption | ||||||||||||||
| A/D | 2.49* | 0.79 | 3 | 1 | 0–4 | 1* | 2 | 1.47*a | 0.86 | 2 | 1 | 0–3 | 5* | 14 |
| D-Only | 2.58* | 0.81 | 3 | 1 | 1–4 | 0 | 0 | 1.48*a | 0.79 | 1 | 1 | 0–4 | 2* | 6 |
| Collapsing WM Updating Task Completion condition | 2.58* | 0.80 | 3 | 1 | 0–4 | 1* | 1 | 1.48*a | 0.82 | 1 | 1 | 0–4 | 7*a | 10 |
| Subjective intoxication during AL procedures | ||||||||||||||
| A/D | 2.29* | 0.79 | 2 | 1 | 0–4 | 2* | 4 | 1.35*a | 0.77 | 1 | 1 | 0–3 | 5* | 14 |
| D-Only | 2.79* | 0.81 | 3 | 1 | 1–4 | 0 | 0 | 1.33*a | 0.92 | 1 | 1 | 0–3 | 6*a | 17 |
| Collapsing WM Updating Task Completion condition | 2.52* | 0.83 | 2 | 1 | 0–4 | 2* | 2 | 1.34*a | 0.84 | 1 | 1 | 0–3 | 11*a | 15 |
| Subjective intoxication during DL procedures | ||||||||||||||
| A/D | 1.55 | 0.78 | 1 | 1 | 0–4 | 2* | 4 | 0.68*a | 0.81 | 0.5 | 1 | 0–3 | 17a | 47 |
| D-Only | 1.92 | 0.85 | 2 | 1 | 0–4 | 1* | 3 | 0.88*a | 0.78 | 1 | 1 | 0–3 | 11a | 31 |
| Collapsing WM Updating Task Completion condition | 1.72* | 0.83 | 2 | 1 | 0–4 | 3* | 3 | 0.78*a | 0.79 | 1 | 1 | 0–3 | 28a | 39 |
| Perceived number of standard drink equivalents consumed | ||||||||||||||
| A/D | 4.09* | 1.18 | 4 | 2 | 3–8 | 0 | 0 | 2.62*a | 1.30 | 3 | 1 | 0–7 | 2* | 5 |
| D-Only | 4.10* | 1.20 | 4 | 2 | 2–7 | 0 | 0 | 2.81*a | 1.50 | 3 | 1 | 1–7 | 0 | 0 |
| Collapsing WM Updating Task Completion condition | 4.09* | 1.19 | 4 | 2 | 2–8 | 0 | 0 | 2.71*a | 1.39 | 3 | 1 | 0–7 | 2* | 3 |
Note. A/D = participants who completed the WM Updating tasks on both the ascending limb (AL) and descending limb (DL) of the breath alcohol concentration curve (Alcohol n = 46; Placebo n = 36). D-Only = participants who completed the WM Updating tasks only on the DL (Alcohol n = 39; Placebo n = 35). Med = median; IQR = inter-quartile range. R = range, shown as min – max. #0 = Number of participants for whom response was 0. %0 = percentage of participants for whom response was 0. Item and response language are provided in Supplemental Materials. Mean drink estimates and intoxication ratings were evaluated using t tests (* = p < .05 for null hypothesis test of group mean equivalence to 0; a = p < .05 for null hypothesis test of Placebo group mean equivalence to Alcohol group mean). Rank-based Wilcoxon tests (on group medians) produced the same pattern of results. Pearson χ2 tests (df = 1) were used on the #0 (* = p < .05 for null hypothesis test of uniform distribution of #0s and #non-0s within groups; a = p < .05 for null hypothesis test of similar distribution of #0s and #non-0s between Placebo and Alcohol groups). For drink estimate #0, the null hypothesis test of uniformly distributed 0s and non-0s could not be conducted for experimental cells in which no participants indicated 0 drinks.