250 Chapter 5 Table 7 Hierarchical linear regression analyses predicting arousal and state-anxiety at post-test Dependent Variable Arousal at post-test State-anxiety at post-test Unstandardized estimate b [95% CI] (SE) Unstandardized estimate b [95% CI] (SE) Step 1 b Constant 1.80 [ 1.00; 2.67] ** (0.41) 2.69 [ 1.90; 3.53] ** (0.40) Arousal at pre-test (control variable) 0.38 [ 0.02; 0.75] * (0.18) State-anxiety at pre-test (control variable) 0.31 [ 0.05; 0.58] * (0.13) Affect at post-test (control variable) -0.34 [-0.48; -0.21] ** (0.07) Step 2 c Constant 1.75 [ 0.76; 2.80] ** (0.53) 2.69 [ 1.90; 3.58] ** (0.41) Arousal at pre-test (control variable) 0.39 [ 0.01; 0.77] * (0.19) State-anxiety at pre-test (control variable) 0.31 [ 0.05; 0.58] * (0.14) Affect at post-test (control variable) -0.35 [-0.49; -0.21] ** (0.07) Trailer-condition a 0.07 [-0.56; 0.72] (0.33) 0.02 [-0.23; 0.24] (0.12) Step 3a d Constant 1.73 [ 0.70; 2.65] ** (0.51) 2.64 [ 1.87; 3.51] ** (0.40) Arousal at pre-test (control variable) 0.40 [ 0.03; 0.80] * (0.19) State-anxiety at pre-test (control variable) 0.31 [ 0.05; 0.58] * (0.14) Affect at post-test (control variable) -0.33 [-0.47; -0.19] ** (0.07) Trailer-condition a 0.08 [-0.53; 0.74] (0.33) 0.02 [-0.23; 0.25] (0.12) Motivation to change 0.33 [-0.87; 1.22] (0.54) 0.27 [-0.18; 0.67] (0.21) Interaction: motivation to change X trailer-condition -0.25 [-1.61; 1.46] (0.79) -0.23 [-0.79; 0.39] (0.29) Step 3b e Constant 1.58 [ 0.51; 2.57] ** (0.51) 2.81 [ 1.97; 3.72] ** (0.42) Arousal at pre-test (control variable) 0.47 [ 0.10; 0.86] * (0.19) State-anxiety at pre-test (control variable) 0.27 [-0.05; 0.58] (0.15) Affect at post-test (control variable) -0.37 [-0.50; -0.24] ** (0.07)
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