Original Poster (Clear Image) Link Found Here!

Authors

Juneun Jay Park

• Graduate Student
• University of Illinois, Urbana-Champaign
• Social/Clinical-Community Psychology
• juneunp2@illinois.edu

Jiaxu Han

• Graduate Student
• University of Illinois, Urbana-Champaign
• Clinical-Community Psychology
• jiaxuh2@illinois.edu

Yang Lu

• Graduate Student
• University of Illinois, Urbana-Champaign
• Clinical-Community Psychology
• yanglu13@illinois.edu

Catharine Edith Ann Fairbairn

• Associate Professor
• University of Illinois, Urbana-Champaign
• Clinical-Community Psychology
• Cognitive Neuroscience Psychology
• Social-Personality Psychology
• cfairbai@illinois.edu

ML Results

Study 1 (Between-Subjects)

• RepeatedStratifiedKFold (n_splits=3, n_repeats=3)
• 48 groups (3 people nested in one group) x 3 = 144 cases

Fold 1: ROC AUC Score = 0.75 Fold 2: ROC AUC Score = 0.89 Fold 3: ROC AUC Score = 0.84

Repeat 1 Averaged ROC AUC: 0.81 Repeat 1 AUC 95% Confidence Interval: 0.67 - 0.93

Fold 4: ROC AUC Score = 0.77 Fold 5: ROC AUC Score = 0.71 Fold 6: ROC AUC Score = 0.89

Repeat 2 Averaged ROC AUC: 0.79 Repeat 2 AUC 95% Confidence Interval: 0.65 - 0.92

Fold 7: ROC AUC Score = 0.84 Fold 8: ROC AUC Score = 0.88 Fold 9: ROC AUC Score = 0.73

Repeat 3 Averaged ROC AUC: 0.79 Repeat 3 AUC 95% Confidence Interval: 0.63 - 0.92

Average ROC AUC Score Across All Repeats: 0.80 Average AUC 95% Confidence Interval Across All Repeats: 0.65 - 0.92

Sensitivity (True Positive Rate): 0.79 Specificity (True Negative Rate): 0.68

Study 2 (Within-Subjects)

• StratifiedGroupKFold (n_splits=3)
• n_repeats=3 loop with testing different random states for variability
• 20 groups for alcohol and 20 groups for control (N=40 Groups) x 3 = 120 cases

— Repeat 1 of 3 — Fold 1: ROC AUC Score = 0.80 Fold 2: ROC AUC Score = 0.78 Fold 3: ROC AUC Score = 0.92

Repeat 1 Averaged ROC AUC: 0.83 Repeat 1 AUC 95% Confidence Interval: 0.68 - 0.94

— Repeat 2 of 3 — Fold 1: ROC AUC Score = 0.84 Fold 2: ROC AUC Score = 0.78 Fold 3: ROC AUC Score = 0.92

Repeat 2 Averaged ROC AUC: 0.84 Repeat 2 AUC 95% Confidence Interval: 0.68 - 0.94

— Repeat 3 of 3 — Fold 1: ROC AUC Score = 0.82 Fold 2: ROC AUC Score = 0.76 Fold 3: ROC AUC Score = 0.92

Repeat 3 Averaged ROC AUC: 0.83 Repeat 3 AUC 95% Confidence Interval: 0.69 - 0.95

Average ROC AUC Score Across All Repeats: 0.83 Average AUC 95% Confidence Interval Across All Repeats: 0.68 - 0.95

Sensitivity (True Positive Rate): 0.85 Specificity (True Negative Rate): 0.75

References

• Fairbairn, C. E., Sayette, M. A., Amole, M. C., Dimoff, J. D., Cohn, J. F., & Girard, J. M. (2015). Speech volume indexes sex differences in the social-emotional effects of alcohol. Experimental and Clinical Psychopharmacology, 23(4), 255–264. https://doi.org/10.1037/pha0000021

• Suffoletto, B., Anwar, A., Glaister, S., & Sejdic, E. (2023). Detection of Alcohol Intoxication Using Voice Features: A Controlled Laboratory Study. Journal of studies on alcohol and drugs, 84(6), 808–813. https://doi.org/10.15288/jsad.22-00375