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Give difference between field experiment and quasi experiment |
Answer» In a\xa0true\xa0experiment, participants are randomly assigned to either the treatment or the control group, whereas they are not assigned randomly\xa0in a quasi-experiment.\xa0Randomized trials\xa0are\xa0experiments in\xa0which the division into treatment and\xa0control\xa0groups is determined at random (for example, by tossing a coin). ...\xa0In\xa0some cases,\xa0quasi-experiments\xa0also involve random assignment, such as\xa0in the\xa0lotteries sometimes used to distribute school vouchers.\xa0In a true\xa0experiment, each participant who volunteered would have an equal chance of being assigned to any of the three groups.\xa0Quasi-experiments\xa0are employed when the researcher is interested in independent variables that cannot be randomly assigned.\xa0Quasi-experimental\xa0research involves the manipulation of an independent variable without the random assignment of participants to conditions or orders of conditions. Among the important types are nonequivalent groups designs, pretest-posttest, and interrupted time-series designs. | |