stroop realtime observation game base psychological stroop effect phenomenon cause different function brain interfere anotherthe card stroop display single word word print color black red blue yellow size big little style hollow solid different number letter challenge read word quickly match description word mdash regard second word saysin round game player deal equal number card card turn faceup center table form base pile player race find card deck center card describe place pile change center card play continue player run cardsthe second round game similar rule eligible card play reverse card play text describe quality card center player few card remain win

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