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Experiment al methods are scientific research methods that are applied in research where the researcher manipulates on the of the entities or valuables in the research to gauge the effect that it will have on the other variables of the research. Experimental methods are thus tools used to analyze and present the best out of the available results that can be obtained in an experiment. In an experiment, there are two vital parameters that can be used in the conduction of a research. These are the independent variable and the dependent variables
Independent variables are the parameters that can be altered in the course of performing of an experiment. These variables are used mainly to gauge the flexibility of an experiment. They are used to check how other variables in the experiment would respond in the case of the where the course of the experiment takes another turn. On the other hand, dependable variable are the variable that are measured when the independent variables are altered. The nature of the experiment determines the values to be changed so to produce the desired results.

On the other hand, experimental groups are the research items that are used in the scientific research experiments on which the procedures of the experiment are done. This group is exposed to the independent variable being tested and the changes observed and recorded. A control group is a group separated from the rest of the experiment where the independent variable being tested cannot influence the results. This isolates the independent variable’s effects on the experiment and can help rule out alternate explanations of the experimental results.

While all experiments have an experimental group, not all experiments require a control group. Controls are extremely useful where the experimental conditions are complex and difficult to isolate. Experiments that use control groups are called controlled experiments. There are two other types of control groups where the conditions the group are subjected to will cause predetermined results.

There are two categories of control groups; a positive control group and negative control group. Positive control groups are control groups where the conditions guarantee a positive result. O, n the other hand, negative control groups are control groups where conditions produce a negative outcome. Negative control groups help identify outside influences which may be present that were not unaccounted for, such as contaminants.

In the research, “People Lie for a Reason: Three Experiments Documenting the Principle of Veracity”, the research was conducted on the basis of Sissela Bok’s principle of veracity which stipulates that the there is a general tendency to have an inclination of saying the truth rather than lying; only in the absence of certain conditions. The research therefore seeks to establish the prospect of speaking the truth in the presence of certain conditions which have been varied to make the research suit the expectations.

The research method used in the study is qualitative where various research participants who had been subdivided into group to gauge if he principle applied effectively. Presenting each of the variations of the research upon the students, the research sought to analyze the various requirements under which the principle applied. Each of the variations used. Analyzing each of the data obtained presents the researchers with quality information.
The major disadvantage of this research method; qualitative research method is that it collects data about what a particular select group of participants feels or thinks, or how they behave. One can’t necessarily use this data to make assumptions beyond this specific group of participants. It is not a research method that conveniently allows for the collection of statistical data. However this is only a disadvantage if your research question also requires statistical data. Adopting a mixed methods approach is one way of overcoming this problem.

On the other hand, the research method can be advantageous especially when the research focuses on small groups, it can be less expensive than quantitative research which may require large groups of participants or expensive measurement tools.