Table 3.

Stepwise LDA results.

	Wilks λ	χ2	Significance level	Classification accuracy
Input based on areas showing a ‘group’ × ‘valence contrast’ interaction
All contrasts before cluster threshold correction •VLPFC (neu–neg) •VLPFC (pos–neu) •Dorsal cingulate gyrus (neu–neg) •Dorsal cingulate gyrus (pos–neg)	0.067	37.067	p < 0.001	100%
All contrasts after cluster threshold correction •MFG (pos–neu) •IPL (pos–neu) •VLPFC (neu–neg)	0.159	26.768	p < 0.001	100%
Input based on areas showing a main effect of valence
All contrasts after cluster threshold correction •Caudate nucleus (neu–neg) •DMPFC (pos–neg)	0.477	11.094	p = 0.004	100%

VLPFC = ventrolateral prefrontal cortex, MFG = middle frontal gyrus, IPL = intraparietal lobule, DMPFC = dorsomedial prefrontal cortex.