Feedback was given only during practice, not during scored test blocks.

Evidence

Participants were given feedback after each trial (the response button briefly turned green for correct and red for incorrect) and a final practice score. … Blocks as detailed in Table 1 were presented in random order. Once they had completed all the test blocks, participants were presented with a bar graph showing their score in each block. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5294