Mutsara 1: Muna 1933, Cattell akanyora kuti pamadzinza ose okuNordic, ` ` rakanga riri rudzi rweEurope rwakanga rwakakura zvikurusa muungwaru nokugadzikana kwounhu. Mutsara 2: Muna 1933 Cattell akanyora kuti, pamadzinza ose eEurope, rudzi rwechiNordic ndirwo rwakanga rwakanyanya kukura muungwaru uye kugadzikana kwechimiro. " ' Mubvunzo: Mutsara wokutanga nomutsara wechipiri unoreva chinhu chimwe chete here? Hungu kana kuti Aiwa?
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