What are the advantages and disadvantages of evaluation research?

Answer 1

Advantages:

- practical orientation

- can reveal whether policies work/do not work

- explains underlying logic behind the programme

- it can improve programme effectiveness

Disadvantages:

- conflicts of interests among stakeholders

- costs of evaluation: it diverts resources from the programme

- apart from possessing research skills, researcher has to play different roles: collaborator, trainer, group facilitator etc. in order to smooth conflicts of interest

- it is difficult to generalize based on evaluation results

Answer 2

1. It permits preliminary testing of the hypotheses that leads to testing more precise hypotheses in the main study. It may lead to changing some hypotheses, dropping some, or developing new hypotheses. 2. It often provides the researcher with ideas, approaches, and clues you may not have foreseen before conducting the pilot study. Such ideas and clues increase the chances of getting clearer findings in the main study. 3. It permits a thorough check of the planned statistical and analytical procedures, giving you a chance to evaluate their usefulness for the data. You may then be able to make needed alterations in the data collecting methods, and therefore, analyze data in the main study more efficiently. 4. It can greatly reduce the number of unanticipated problems because you have an opportunity to redesign parts of your study to overcome difficulties that the pilot study reveals. 5. It may save a lot of time and money. Unfortunately, many research ideas that seem to show great promise are unproductive when actually carried out. The pilot study almost always provides enough data for the researcher to decide whether to go ahead with the main study. 6. In the pilot study, the researcher may try out a number of alternative measures and then select those that produce the clearest results for the main study.

Answer 3

An ex-vivo experiment allows the experimenter to test tissue or material that is outside of the organism. The advantages are that the experimenter is using the tissue in conditions that are controlled, but with minimal changes to it's natural environment. Therefore, experimenters are able to perform tests on tissue that would not be humane, or even possible, to do to a living creature. A disadvantage would be that doing ex-vivo experiments, you are not able to fully test how the alterations would affect the rest of the organisms body.

Answer 4

Advantages of experimental design in research:

Experimental design allows scientists to draw conclusions about the causal relationship among variables under controlled conditions.

Disadvantages:

Many important variables cannot be manipulated.

It can be expensive and time consuming.

Human errors can occur.

Answer 5

What gives non-experimental designs its advantages actually contributes to its disadvantages. Since they are easy to conduct, many doctoral researchers do not put enough effort into exploring extant literature for what has already been done on the subject and often conduct non-experimental research on a whim. In addition, non-experimental designs often suffer from common method bias, specifically single-source bias, because collection of both dependent and independent variables from the same source is so easy and convenient.

Answer 6

The advantage is that you are more likely to find out what causes the reaction and you get more detailed on the process.

The disadvantage is that it takes more time.