The main sections of the book address criminological research and methodology research that uses quantitative data research that uses qualitative data and ethical and political issues in criminological research. Criminal justice research methods qualitative and quantitative approaches by w lawrence neuman 1999 07 02 w lawrence neumanbruce wiegand books amazonca. Methods are used more often than qualitative methods in criminology and criminal justice importantly quantitative and qualitative methods differ in several ways the present study contributes to the literature by presenting a theoretical treatment of quantitative and qualitative research the study begins by presenting quantitative and . Both qualitative and quantitative methods are useful for theory development and testing although a heavier emphasis in criminology and criminal justice appears to be placed on qualitative research for theory development versus quantitative research for theory hypothesis testing and program evaluation