1. Alcohol
| | Increased significantly | Increased moderately | Increased slightly | Did not change | Decreased slightly | Decreased moderately | Decreased significantly | Not applicable |
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| 1st year at Caltech | | | | | | | | |
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| 2nd year at Caltech | | | | | | | | |
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| 3rd year at Caltech | | | | | | | | |
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| 4th year at Caltech | | | | | | | | |
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| 4th year plus at Caltech | | | | | | | | |
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