what does and/ mean in "The “improved” score is calculated based on the training blocks and/ of the actual test blocks. '

Question

Implicit Association Test (IAT)

Sentence is under the heading 'Utilization of the collected D-scores'
Thanks Kerry

Answer 1

That means that Greenwald et al. suggest not only to use the test blocks (two of the seven blocks) but also the trainig blocks (two more blocks) to calculate a more accurate D-score.

I recommend reading their paper to understand the background.