Pearson had a quiet disposition, but his shy and rather diffident manner hid an independent and pertinacious spirit which had enabled him to surmount both the controversies surrounding his father Karl and contemporaries like Fisher and Neyman, and some health problems, such as his delicate health when an undergraduate, a heart condition of long standing, and occasional back trouble due to his considerable height.
Pearson nagkaroon ng isang tahimik na kaugalian, ngunit ang kanyang mahiyain at sa halip kimi paraan hid ng isang malayang diwa at matigas na may-enable sa kanya upang mapagtagumpayan ang parehong controversies kalapit ang kanyang ama at Karl contemporaries like Fisher at Neyman, at ilang mga problema sa kalusugan, tulad ng kanyang maselan kalusugan kapag isang undergraduate, isang puso kalagayan ng matagal nakatayo, at paminsan-minsan na i-back problema dahil sa malaki ang kanyang taas.