In some subjects the predicted contraction did occur, but taken as a group the effect did not reach statistical significance ( p = 0.23).
2
0.2300
0.2300
The sentences
In the Narrow condition, the JND showed a trend suggesting a decrease, but the change was not statistically significant (median normalized JND change among all subjects = −0.13, Wilcoxon signed rank test, p = 0.23).