Table 2.

Gain for conjunction of features A and B (in ms). Median reaction times were computed separately for the set of images containing feature A without feature B and the set of image containing both A + B. Then the median reaction time computed for the images containing A + B was subtracted from the median reaction time computed for the set of images containing A (without B). All negative values indicate that response was speedup when feature B was added to feature A. The values for A in conjunction with “non B” are opposite to the values of A in conjunction with B and have not been represented.

A	B	Side view	Totally visible	Typical position	One animal	Mouth(s) visible	Eye(s) visible	Exactly 4 limbs
Side view			2	−10*	−3	−5	−5	−16**
Totally visible		5		−13**	−4	−2	−5	−17**
Typical position		9*	−2		−7	−3	−10**	−15*
One animal		5	−2	−14**		−1	−5	−13*
Mouth(s) visible		3	1	−5	−2		−5	−12*
Eye(s) visible		3	1	−9*	−1	−1		−11
Exactly 4 limbs		13		−6	5	15	5
Not side view			−1	−11*	−8	11	−16*	−25*
Partialy vis		2		0	7	−51**	−26*
Not typical position		9	10		7	−10	−7	−15
Not one animal		0	10	0		−20**	−7	−22*
No mouth visible		18*	−49**	−11	−21**		−20**	−35**
No eye visible		−8	−21*	−6	−3	−16**		−23*
Not 4 limbs		5	2	−7*	−3	−8*	−7*

P-values corrected for multiple comparison using the False Discovery Rate method (Benjamini and Hochberg, 1995) (*p < 0.05; **p < 0.01).