Fülle die Lücken, um den Text zu vervollständigen.
Pure or true experiment: the first requirement to consider an “pure” is the intentional manipulation of one or more independent variables. The variable is the one that is considered as alleged cause in relation and the effect caused is denominated as dependent variable. In a pure or true experiment can be used which are equivalent to the manipulated ones, as to compare the effect of the studied variable into the subjects.