Often the results can be representative of the study as a whole and produce similar results each time the program is evaluated, giving it higher internal validity. Since there is a control group, the external influences that are not measured are the same for both groups, thus leaving fewer assumptions to make. The experimental research design also tends to be easier to analyze than other research designs. The problem with experimental research, however, is that there may be political or ethical issues surrounding withholding treatment from the control group, depending on the type of treatment and whether or not it is beneficial to the treatment group. To avoid this, the researcher should develop a plan to administer the treatment to the control group once the treatment has been proven effective. Experimental research can also prove very expensive and time-consuming, making it difficult for some researchers to obtain the funding and time needed to ensure they can carry out an effective experiment for their research project. (PANDA) In conclusion it should be noted that both of these research designs have their uses and disadvantages, and it is important to ensure that you choose the correct design for the research question being asked, whether it is one of these or a other research design that was not discussed. When conducting research it is also important to remember that very often it can be more effective to use two designs rather than one, as it can increase the validity of the research, but only if it is relevant to answering the research question asked..