Table 6.
Flowers task: multilevel model of marijuana high in relation to number of correct responses.
| Effects | Flower number of correct responses (n=58) | |||||
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Estimate | SE | 95% CI | P value | ||
| Fixed effects |
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Person level (level 2) | |||||
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Intercept | 2.92 | 0.85 | N/Aa | .001b | |
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Session | 0 | 0 | N/A | .007b |
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Session2 (quadratic) | N/A | N/A | N/A | N/A |
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Subjective high (PMc) | −0.35 | 0.2 | N/A | .08 |
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Distraction (PM) | 0.83 | 0.65 | N/A | .2 |
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Subjective high (PM) × distraction (PM) | 0.18 | 0.15 | N/A | .23 |
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Gender (0=male, 1=female) | −0.05 | 0.11 | N/A | .64 |
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Age (0=age 20) | −0.14 | 0.03 | N/A | .001b |
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Full-scale IQ (0=IQ score of 110) | 0 | 0.01 | N/A | .66 |
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Session level (level 1) | |||||
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Subjective high (CCd) | −0.03 | 0.01 | N/A | .01e |
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Distraction (CC) | −0.13 | 0.03 | N/A | .001b |
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Subjective high (CC) × distraction (CC) | 0.01 | 0.01 | N/A | .21 |
| Random effects | ||||||
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Level 1 residual variance | 0.59 | 0.02 | 0.56 to 0.63 | N/A | |
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Intercept | 0.16 | 0.03 | 0.10 to 0.24 | N/A | |
aNot applicable.
bP<.01.
cPM: person mean scores, reflecting individual differences in subjective marijuana high or distraction across all sessions.
dCC: constant-centered scores (centered at 0), reflecting session-to-session variation in scores or session-specific scores.
eP<.05.