http://general-terms.thesaurus.ekt.gr/vocabhttp://general-terms.thesaurus.ekt.gr/vocab?tema=10835perception http://general-terms.thesaurus.ekt.gr/vocab?tema=10835 cognitive processes BT http://general-terms.thesaurus.ekt.gr/vocab?tema=10835 illusions (perception) RT http://general-terms.thesaurus.ekt.gr/vocab?tema=10835 sensory perception NT http://general-terms.thesaurus.ekt.gr/vocab?tema=10835 spatial perception NT