In studying cause effect relationship between two relationships :
The causal variable leading to change in effected Variable is the Independent Variable. The effected variable being changed due to causing variable is the Dependent Variable.
So, studying : 'Memory Drug' impact - on 'Story Retention Quiz Score' implies that Memory Drug is the Independent Variable effecting Story Quiz Score & Story Quiz is the Dependent Variable being affected by Memory Drug.
The correct answer is amount of the drug; quiz scores
Independent variable
these variables influence, affect or determine other variables.
it is a determining factor, condition or cause for a given result, effect or consequence.
it is the factor manipulated by the researcher in order to determine the relationship of the factor with the observed phenomenon, to see what influence it has on a possible result.
Dependent variable
they are values (phenomena or facts) to be discovered or explained, by virtue of being influenced, determined or affected by the independent variable.
it is the factor that appears, disappears, increases or decreases as the researcher modifies the independent variable;
it is the property that or factor that is an effect, result, consequence or response to something that has been manipulated (independent variable).
