forestdev·قبل 8 سنوات·discussI'm surprised no one has asked the obvious: why the heck were they emailing this kind of attachment period...
forestdev·قبل 8 سنوات·discussWithout this being a double-blind experiment, than it is highly questionable. People over-compensate for bias if you tell them you're testing their bias. The fact that the abstract makes no mention of this is highly suspect.