I am not sure as to whether I should ask this question here, so let me know if I should ask it somewhere else. I am a bit in doubt as to whether I should (partially) reward a participant. The participant has correctly answered all attention checks and there has been a technical issue with my study. However, the participant’s completion time has been below 1%, so it is almost at 3 standard deviations. Other participants usually take 20 to 45 minutes or even longer, compared to 8 minutes for this participant. I am not sure, as to what might be appropriate in this situation? The attention checks are fine, but since the completion time is this short I am not sure about the quality of the data.
Thanks in advance.