The just world scale is a questionnaire designed to measure the extent to which individuals believe in a just world, and contains a list of statements such as “Many people suffer through absolutely no fault of their own”, and “It is rare for an innocent man to be wrongly sent to jail”. The scale was presented by psychologists Zick Rubin and and Anne Peplau in the 1970s.

Source:

Zick Rubin, Letitia Anne Peplau: Just World Scale (JWS), 1975, Journal of Social Issues, 31, 65–89