First time using Prolific and i had a little surprise: We ask to participants to listen to sounds (entirely and carefully) and to categorise them. For several participants (about 25%), the time spend on the task is far less than the time which is necessary to listen to the sounds… (even with a 10% tolerance).
I rejected some of them (who seem unhappy, even when i show them the data supporting that they did not follow the instruction) but i reached a limit.
To whom should i ask to increase the rejection limit? I wrote a message some days ago but no answer…
Many thanks for your help!