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. 2007 Aug 16;91(11):1493–1498. doi: 10.1136/bjo.2006.108084

Table 2 Two‐tailed independent samples T test for equality of preattentive visual search and choice reaction time mean response times across normal, suspect and glaucoma subjects.

Flicker Displacement Orientation CRT
Glaucoma vs suspect T  =  7.432 T  =  6.251 T  =  9.336 T  =  3.783
p<0.001 p<0.001 p<0.001 p<0.001
dF  =  63.822 dF  =  80 dF  =  63.258 dF  =  80
Glaucoma vs normal T  =  9.157 T  =  7.535 T  =  10.963 T  =  2.352
p<0.001 p<0.001 p<0.001 p = 0.021
dF  =  51.011 dF  =  46.251 dF  =  50.395 dF  =  80
Suspect vs normal T  =  1.758 T  =  2.183 T  =  1.393 T  =  −0.953
p = 0.083 p = 0.032 p = 0.168 p = 0.343
dF  =  68.798 dF  =  71.038 dF  =  68.196 dF  =  80

CRT, choice reaction time; dF, degrees of freedom.