Table 2 Classification quality of sorting Schizophrenia patients from others subjects, or sorting between low and high negative symptom severity, using the Disorganization Index obtained from dream + negative image reports, negative image reports, or dream reports only

Disorganization Index	Classification	Sensitivity	Specificity	Precision	Recall	F-measure	AUC	Accuracy
Dream + Negative Recent-onset Sample	S × (B + C)	0.92	0.76	0.91	0.92	0.91	0.85	91.67
	High × Low	1.00	1.00	1.00	1.00	1.00	1.00	100.00
Only Negative Recent-onset Sample	S × (B + C)	0.81	0.64	0.80	0.81	0.80	0.79	80.95
	High × Low	0.95	0.95	0.96	0.95	0.95	0.97	95.23
Only Dream Recent-onset Sample	S × (B + C)	0.78	0.62	0.80	0.78	0.79	0.77	77.78
	High × Low	0.73	0.67	0.73	0.73	0.73	0.80	73.33
Dream—Chronic Sample	S × (B + C)	0.85	0.78	0.85	0.85	0.85	0.81	85.00
	High × Low	0.73	0.62	0.72	0.73	0.72	0.81	73.33

The last row shows an independent validation of the Disorganization Index calculated for dream reports of a chronic psychotic sample.⁹ S × (B + C) indicates that the classification was performed between the Schizophrenia group (S) vs. the sum of Bipolar and Control groups (B + C)

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