Table 2

Mean preference function slopes expressed by high and low food females, and overall preference function slopes expressed by all females. Differences among treatments are assessed using a paired-sample t-test. Deviations of common preference functions from zero are assessed using a one-sample t-test.

Comparison of treatment preference functions
 Common preference function


Mean slopes*
 Paired t-test
 Mean slope* (SE)
 One-sample t-test

High
 Low
 t9

 P
t19
 P
Body area
 0.6 (0.4)
 0.3 (0.4)
 0.506
 0.625
 0.4 (0.3)
 1.443
 0.083
Tail area
 0.8 (0.9)
 0.7 (0.8)
 0.092
 0.928
 0.6 (0.6)
 1.252
 0.113
Black area
 52.3 (60.1)
 60.8 (52.1)
 -0.152
 0.882
 56.5 (38.7)
 1.460
 0.081
Fuzzy black area
 13.2 (53.3)
 63.5 (48.2)
 -0.848
 0.418
 38.3 (35.5)
 1.082
 0.147
Orange area
 41.3 (32.4)
 64.6 (28.8)
 -1.269
 0.236
 52.9 (21.3)
 2.488
 0.011
Iridescent area
 60.8 (46.5)
 75.5 (55.7)
 -0.273
 0.791
 68.1 (35.4)
 1.928
 0.035

* all mean slopes are × 100

Syriatowicz and Brooks BMC Ecology 2004 4:5   doi:10.1186/1472-6785-4-5