Table 2 Study 1. Multilevel regression model including stimulus-level and participant-level predictors. Area of Interest (AOI; Brand, health, rest, dummy coded with rest as reference category), brightness, contrast, complexity, and size were level 1 (AOI-level) predictors. Picture type (Alcohol, soda, dummy coded with soda as reference category) and presentation order were level 2 (Picture level) predictors. AUDIT scores, recent alcohol consumption, motivation to reduce drinking and dietary restraint were level 3 (Participant level) predictors. All predictors were included as individual main effects and in all possible two-way and three-way interactions with picture type and AOI
Variable | Model 2 (stimulus-level and participant-level predictors) | |||||
|---|---|---|---|---|---|---|
Two-way interactions | Three-way interactions. | |||||
Main effect | × Picture type | × AOI brand | × AOI health | × AOI brand × Picture type | × AOI health × Picture type | |
b (SE) | b (SE) | b (SE) | b (SE) | b (SE) | b (SE) | |
Intercept | 3.22 (0.84) | - | - | - | - | - |
AOI brand | −3.73 (1.20)** | 0.88 (1.72) | - | - | - | - |
AOI health | −2.95 (0.97)** | 0.18 (1.29) | - | - | - | - |
Picture type | −0.61 (1.09) | - | 0.88 (1.72) | 0.18 (1.29) | - | - |
Order | 0.01 (0.01) | −0.01 (0.01)* | 0.00 (0.01) | −0.003 (0.01) | 0.01 (0.01) | 0.01 (0.01) |
Brightness | −0.001 (0.002) | −0.001 (0.003) | 0.002 (0.003) | 0.001 (0.003) | 0.01 (0.01) | 0.002 (0.004) |
Contrast | −0.01 (0.01)* | 0.01 (0.01) | 0.01 (0.01) | 0.01 (0.01) | −0.01 (0.01) | 0.01 (0.01) |
Complexity | 11.12 (4.18)** | −1.90 (5.98) | −8.624 (4.83)+ | −10.46 (4.27)* | 2.41 (6.62) | −0.76 (6.13) |
Size | −0.01 (0.01) | 0.01 (0.01) | 0.02 (0.01)* | 0.08 (0.03)* | 0.02 (0.04) | −0.02 (0.01)+ |
AUDIT | −0.004 (0.02) | 0.01 (0.02) | 0.03 (0.02) | 0.004 (0.02) | −0.04 (0.03) | −0.004 (0.03) |
Alcohol consumption (last 14 days) | 0.002 (0.01) | −0.004 (0.01) | −0.002 (0.01) | −0.01 (0.01) | 0.003 (0.01) | 0.01 (0.01) |
Motivation to reduce drinking | −0.04 (0.03)+ | 0.08 (0.04)** | 0.01 (0.03) | 0.05 (0.03)+ | −0.08 (0.04)** | −0.09 (0.04)* |
Dietary restraint | −0.02 (0.01)* | −0.02 (0.01) | 0.02 (0.01)* | 0.01 (0.01) | 0.02 (0.01) | 0.02 (0.01) |
Random effects | Residual variance | Proportion residual variance explained | ||||
Level 3 | 0.14 (0.03) | 1.46% | ||||
Level 2 | 3.18 (0.06) | 17.15% | ||||
Level 1 | 0 (0) | - | ||||
χ 2(24) | 894.27*** | |||||