Sentence:  Nevertheless, a certain amount of <WSD>schizophrenia</WSD> pertains to the study of World Englishes as New Englishes, for while new Englishes are regarded as valid varieties in their own right, the description and delineation of them in linguistic terms is conducted through the gaze of native-speaker norms. 
Meaning of the word marked with <WSD> tags:  Any condition in which disparate or mutually exclusive activities coexist; a lack of decision between options.