Difference Between True Experimental Design And Quasi Experimental Research Design

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Explain the difference between true experimental design and quasi-experimental research design. Provide examples. Quasi-experimental research designs and experimental research designs both have one aim, which is to test a casual hypothesis (UNICEF, 2014). A true experiment can be defined as testing a hypothesis with randomly assigned groups, where as a quasi experiment can not, so it is simply an experiment that isn’t a true experiment (Kowalczyk, 2015) The main difference stems from the randomisation of participants in their studies. True experimental research randomises participants for their control group and treatment group however, with quasi-experimental research, participants are selected for groups by criteria beyond the researcher’s control (Kowalczk, 2015). True experimental designs are preferred by most researchers as it weighs higher on the internal validity scale, but in some cases it is impossible to randomise participants because of some characteristics such as a gender or marital status. True experimental designs are used in various scientific experiments including drug trials, where participants all have the same disease or illness, but a portion of participants receive the treatment and a portion receive placebos. Quasi experimental designs are used in studies such as comparing the achievement of the first born children with that of the later (Conley, Pfeiffer, Velez, 2007). What does it mean to randomly assign participants to groups and why does it
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