Researching is a meticulous task as you will have to be able to implement the types of research trials so show your readers that your study is indeed the real deal, tested, and proven at the same time. This being said, it is very important that you are able to do as much of the types of research trials before you finalize your study as this will be a great way to prove your point that you are showing in the research you have conducted.
Laboratory types of research trials are done to make sure that the scientific factors of your study are all tested and proven to be correct. There will be times when you will need professional help to conduct these laboratory types of research trials and you must do just that to be able to support your evidence with professional knowledge and expertise. If the study will tackle the human body, it is best that you have a doctor or medical professionals to assist you. They will not, however, give input to your study. They will just be there to make sure that you are doing the right thing so that you will be able to gather the data that you need to support your research study.
Case control types of research trials pertain to the research trial methods wherein you will need to perform trials to the factors of your research area that already have a solid base. After this, you perform another set of trials wherein the factors of your research study has been implemented already. You get the values of these trials and compare and contrast them to each other. This way, you will see whether or not your theories are indeed beneficial or worth researching about.
Cohort types of research trials pertain to the trials that take quite a long time. Here, you will gather a certain number of respondents that you will observe. You will then throw in the factors that you are researching about and see the changes that will happen to these people that you are observing. Remember that in these cohort types of research trials, the respondents are only observed by the researcher. They will not be asked to change anything. They will just be put into different circumstances and situations wherein the factors of the study are taking effect and hence will allow the researcher to come up with the results as he is able to see the changes that will occur.
Randomized types of research trials are the trials that are, random. The beginning of these types of research trials will be like the cohort or case control types of research trials too. However, the people who will be participating here will not be aware of which factors are going to be thrown to them. The people who will receive the trials will be chosen randomly too. This way, there will be no bias in the observation and trial results as they are all unaware of what has been happening around them.