Table 1 Details of the experimental design. CD contrast detection, CM contrast matching, SF spatial Frequency, 2IFC two interval force choice.

1

CD

4

2

2IFC

6

1a, 1c

2

CD

4

2

2IFC

5

1b, 1d

3

CD

4

4

Yes/No

7

2a, 2c

4

CD

0 fovea

6

2IFC

5

2b, 2d

5

CD Half Bino

4

2

2IFC

3

1b, 1d

6

CD

Dichoptic Separation and contrast

4

2

2IFC

3 (separation)

1 (contrast) from

Exps. 2 & 5

Not shown

1b

7

Contrast discriminatio n

4

2

2IFC

2

3b, 3c

8

CM and CM dichoptic

4

2

2IFC

6

3

4a–d, 4e