Table 3. Performance of Möbius participants on lower-level vision and object processing tests in comparison to controls.

	Normal IQ					Older Low-IQ		Younger Low-IQ
	Controls	MB1	MB3	MB4	MB6	Controls	MB2	Controls	MB5
BORB:
Length match	27.50 (1.60)	22*	26	25	26	26.38 (1.20)	27	26.63 (1.06)	25
Size match	26.75 (1.04)	26	23*	26	27	27.00 (0.76)	26	26.13 (2.17)	25
Orientation match	29.38 (4.69)	20	27	25	30	26.75 (1.49)	17*	26.75 (0.89)	25
Gap match	33.63 (5.10)	34	37	37	37	32.88 (3.44)	38	34.00 (3.42)	37
Object decision	119.30 (3.32)	114	112	108*	124	116.30 (3.11)	94*	116.80 (4.53)	111
CCMT	59.88 (8.20)	39*	40	42	70	58.50 (9.59)	36	63.25 (9.68)	46

‘Higher IQ’ refers to Möbius participants and aged-matched controls with IQs within the higher range; ‘Older Low-IQ’ refers to the control group matched to MB2 according to age, IQ and gender; and ‘Younger Low-IQ’ refers to the control group matched to MB5 on the same measures. ‘BORB’ refers to the Birmingham Object Recognition Battery [49]; and ‘CCMT’ to the Cambridge Car Memory Test [52].

^*Represents impaired performance.