Value of True Experiments

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University of Essex Department of Psychology Discovering Psychology: The science Behind Human Behaviour Discuss the value of the true experiment in psychology 1301109 24/10/2013 979 “A true experimental design as the most accurate form of experimental research, in that it tries to prove or disprove a hypothesis mathematically, with statistical analysis” Shuttleworth (2008). This means that an experimental design basically tries to see how accurate an hypothesis is through statistical analysis. So, for an experiment to be classed as a true experimental design, the sample groups must be assigned randomly, in which there must be a viable control group, only one variable can be manipulated and tested i.e. It is possible to test more than one, but such experiments and their statistical analysis tend to be large and difficult and the tested subjects must be randomly assigned to either control or experimental groups. Therefore, in a true experiment subjects are randomly assigned to the levels of the independent variable. The only differences in the groups would be due to chance. Giacomoni (December 2000) said true experimental designs compare people who have received an intervention ("treatment group") to an equivalent group who did not receive the intervention ("control group"). The treatment or control groups are randomly assigned to subjects; so therefore, random assignment is the hallmark of the true experimental designs. The randomized trial in many circles is the “gold standard” of quantitative research, reflecting its degree of methodological rigor. There are many advantages and disadvantages of the experimental design. Shuttlewoth 2008) mentions one of the key advantages, which includes that the results of a true experimental design can be statistically analyzed and so there can be a little argument about the results. Other advantages

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