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Poornima Giri Best Answer
Causal-comparative research is an attempt to identify a causative relationship between an independent variable and a dependent variable.The relationship between the independent variable and dependent variable is usually a suggested relationship (not proven) because you (the researcher) do not have complete control over the independent variable. Causal-comparative research attempts to identify a cause-effect relationship between two or more groups. Causal-comparative studies involve comparison in contrast to correlation research which looks at relationship. For instance, a researcher may wish to compare the body composition of persons who have only trained with free weights versus persons who have only trained with exercise machines. In this case the researcher is not manipulating any variables, only investigating the effect of free weights versus exercise machines on body composition. Obviously, since other factors such as diet, training program, aerobic conditioning could effect body composition, casual-comparative research must be reviewed scrupulously to see how these other factors were controlled.