- Standard errors of the mean are reported in parentheses. Higher values indicate better performance; for each test maximum score is 12. Significant improvements in the post-test relative to the pre-test are indicated in bold. In particular, while the improvements shown in black bold are evident in both CTR and EXP group and are therefore unlinked to the distance discrimination training, the improvements in white bold on black background are exclusively obtained after the training. These skills (Shape span and Size discrimination in BLIND, Shape span and Dot discrimination in SVI) are the generalized spatial skills improved thanks to the distance discrimination training
