what methods are used in psychology? what statistical method was used to research personality traits when was statistical methods used in psychology how has statistical method used for psychology when did regression testing become less used in psychology why are statistical methods used in psychology how has the use of statistical methods in psychology changed how statistics work in psychology how has statistical methods changed in psychology how statistical methods are used in psychology how statistical approaches to the use of information psychology are used when did statistical methods become less common what statistical methods are used in psychology when did non-parametric statistical methods become less commonly used in psychology when was the use of statistical methods in psychology first used in the first years? when did mann-whitney u become less effective? when did statistical methods become less popular how has the use of statistical methods changed in psychology over the year what statistical methods are used in psychology which statistical methods are used for psychology