Table 4.

Group performance at the CFPT

	N	Error score	SD	Range
CFPT upright AUT	62	51.97 95% CI [45.61, 58.32]	25.02 95% CI [21.26, 30.41]	18–116
AUT-NP	41	44.44 95% CI [37.19, 51.69]	22.97 95% CI [18.86, 29.39]	20–96
AUT-P	21	66.67 95% CI [56.37, 76.96]	22.61 95% CI [17.30, 32.65]	18–116
CFPT inverted AUT	62	73.94 95% CI [69.97, 77.90]	15.61 95% CI [13.27, 18.98]	36–102
AUT-NP	41	71.61 95% CI [66.41, 76.81]	16.48 95% CI [13.53, 21.08]	36–100
AUT-P	21	78.48 95% CI [72.58, 84.38]	12.96 95% CI [9.82, 18.72]	50–102
CFPT inversion effect (Inv-Up)
AUT-NP	41	27.17 95% CI [21.88, 32.47]	16.77	− 10–58
AUT-P	21	11.81 95% CI [2.99, 20.62]	19.37	− 32–44
Controls from Bowles et al. 2009	118	26.43	14.41

CFPT Cambridge Face Perception Test, AUT autistic participants, P prosopagnosic, NP nonprosopagnosic, SD standard deviation, CI confidence interval