Quasi-Experimental Designs Assignment Example | Topics and Well Written Essays - 1750 words

Quasi-Experimental Designs - Assignment Examplevi). Single-case designs or single-case research designs are use to studies that factor in individual organism variances than group designs, which emphasize on mean averages of groups (Jackson, 2013). Single-case designs are used where a test subjects behavioral trends are variables of significance in an experiment. This research design is also used in evaluating the effect of sermons on an individual or personal attributes in use research (Jackson, 2013). viii). A multiple-baseline research design involves the measurement of multiple persons, settings or traits before and after assignment to data-based treatment. Treatments are administered, at dissimilar times, to underwrite that changes are due to treatment and not by chance (Jackson, 2013). Reversal experimental design involves measurement of behavior or traits during a baseline periods (A), at the introduction of treatments (B), reinstatement of conditions preceding baseline per iod (A) and during of the reintroduction of the treatment (B) (Jackson, 2013). Question 2 Quasi-experiments are used, in empirical studies, to estimate the impact and influence of an intervention or treatment on its target sample population, and they do not use random assignment (Jackson, 2011). Quasi-experimental designs chuck up the sponge a researcher to chequer the assignment to the treatment condition, using somewhat criterion other than random assignment (Jackson, 2012). This is in the sense that a researcher controls the assignment to the treatment condition, and can in some cases, a researcher can lack control over the assignment to the treatment condition. Quasi-experimental designs are predisposed to quality concerns regarding internal validity because treatment and control groups, in some instances cannot be comparable at baseline levels. This is unlike random experiments where either subjects have a chance of being assigned to the par or the intervention group (Jack son, 2012). The advantages of quasi-experimental designs are that they are used when randomized experimental designs are impractical and unethical. Quasi experiments are easier to prepare than true experimental designs which require random assignment to participants or subjects (Jackson, 2012). The use of quasi-experimental designs eliminates or diminishes threats to external validity because natural environments are not susceptible to the same problems of artificiality compared to well-controlled laboratory setting. Quasi-experimental designs allow their findings to be applied to other subjects and settings, creating a precedent where generalizations can be made about populations (Jackson, 2012). This is because this design type is considered a natural experiment, which makes its findings applicable to other settings and participants. Quasi experiments are efficient especially in longitudinal research studies, which involve longer experimental periods, and can be followed up in dif ferent environmental settings. Quasi-experimental designs give the researcher manipulation options to choose from. This is in the sense that, in natural experiments, manipulations occur on their own accord because researchers have no control over their occurrence. The use of self-selected groups in this design type eliminates the chance of conditional and ethical concerns in the process of conducting the experiment (Jackson, 2012). Estimates or findings in quasi-experimenta