Self-Assessment Inaccuracy Index
Self-assessment Inaccuracy tells you how your perception of the quality of your own work differs from how your peers perceive your work. This is a straightforward concept. If your perception is much higher or lower than that of your peers, you should again consider your abilities as an evaluator.
If your index is between 0.5 and 1, you could ask your instructor to explain why there was such a big difference in the two perspectives (and who you instructor thinks is more accurate). There are once again many factors that can affect this number. Do not be alarmed, but do show some concern and try to understand why there is a difference.