Table 2 Binomial models comparing performance in the four types of probe trials and the level of significance.

From: Giant pandas can discriminate the emotions of human facial pictures

Probe trial

Estimate*

Standard error

z59

P

a

1.285

0.313

4.101

<0.001

b

0.619

0.271

2.287

0.022

c

0.547

0.268

2.040

0.041

d

1.012

0.292

3.465

0.001

  1. aThe same horizontal half of the face as in the standard trials but with novel faces; b: the other horizontal half of the same faces used in the standard trials; c: the other horizontal half of the novel faces; d: the left half (vertical) of the faces of the same persons used in the standard trials.
  2. *Coefficient estimate of binomial models with logit link, value of zero indicates a choice probability of 50%.
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