Table 4.

Objectively observed item classification.

Symptom			Modality		AUROCa		Accuracy (random)		F score
									Above clinical threshold		Below clinical threshold
Brief Psychiatric Rating Scale
	Blunted affect	Voice		0.81		0.95 (0.87)		0.40 |		0.97
	Motor retardation	Face		0.68		0.94 (0.88)		0.36		0.97
Scale for the Assessment of Negative Symptoms
	Paucity of expression	Voice, face		0.81		0.80 (0.66)		0.42		0.88
	Global affective flattening	Voice, face		0.79		0.82 (0.71)		0.44		0.89
	Lack of vocal inflection	Voice, face		0.71		0.88 (0.78)		0.43		0.94
	Unchanging facial	Face		0.64		0.83 (0.70)		0.39		0.90

^aAUROC: area under the receiver operating characteristic curve.