Table 4 Estimated marginal means for each the flanker contrast levels at 3λ.

From: Characterization of contrast-mediated collinear interactions in the human visual system

Level

Emmean

SE

df

Lower CL

Upper CL

t. ratio

p. value

0.1

0.005

0.050

232

− 0.130

0.139

0.096

0.947

0.22

0.017

0.047

224

− 0.111

0.145

0.352

0.947

0.46

− 0.014

0.047

224

− 0.142

0.114

− 0.290

0.947

1

0.003

0.047

224

− 0.125

0.131

0.067

0.947

2.15

− 0.127

0.047

223

− 0.255

0.002

− 2.679

0.019*

4.64

− 0.183

0.047

224

− 0.311

− 0.055

− 3.871

0.001*

10

− 0.173

0.048

228

− 0.304

− 0.042

− 3.580

0.001*

  1. These results suggest that at 3λ, higher flanker contrast levels generally lead to collinear facilitation, whereas 1.5λ elicits a mix of facilitation and inhibition, with significant facilitation at intermediate flankers’ contrast levels and inhibition at higher flankers’ contrast levels.
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