Answer:
Bernard (1994) says that there are five steps to follow in conducting true experiments with people.
Arrange the following statements to form a coherent five-step true experiment. Assign number from 1-5.
( 4 ) The dependent variables are measured again. This is the posttest.
( 5 ) The intervention (the independent variable) is introduced.
( 3 ) The groups are measured on one or more dependent variables (income, infant mortality, attitude toward abortion, knowledge of curing techniques, or other things you hope to change by the intervention); this is called the pretest.
( 1 ) Individuals must be randomly assigned, either to the intervention group or to the control group to ensure that the groups are equivalent. Some individuals in a population may be more religious, or more wealthy, or less sickly, or more prejudiced than others but random assignment ensures that those traits are randomly distributed through the groups in an experiment. The degree to which randomization ensures equivalence, however, depends on the size of the group created. With random assignment, two groups of 50 are more equivalent than four groups of 25.
( 2 ) You need at least two groups, called the treatment group (or the intervention group or the stimulus group) and the control group. One group gets the intervention (a new drug, for example), and the other group (the control group) doesn't.