Two changes were in this manner acquainted relative with the monkey undertaking. Initially, jolts were PC produced complex geometric examples imprinted resting on “10 cm × 10 cm” cardboard plaque. Second, people were to hunt down the article covering a prize in every jolts pair they were given and, in the meantime, to listen to answer a test toward the end of the session, every inquiry accurately addressed procuring an extra 0.20€ prize.
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