Table 3.

	Psychosis Positive	Psychosis Negative
Psychosis Proneness Positive	True Positive:  10	False Positive:  7	Positive Predictive Value: $\frac{TP}{TP+FP}=\frac{10}{10+7}=0.59$
Psychosis Proneness Negative	False Negative:  1	True Negative:  79	Negative Predictive Value: $\frac{TN}{TN+FN}=\frac{79}{79+1}=0.99$
	$\frac{TP}{TP+FN}=\frac{10}{10+1}=0.91$	$\frac{TN}{TN+FP}=\frac{79}{79+7}=0.92$