
David M. answered 01/21/20
M.A. in psychology from McGill University
First you should decide the nature of the fictitious experiment. The best way I can think of to develop that is simply look at journals that describe real experiments. Then, your fictitious experiment can be just an alteration of one or more of the real experiments that you see in the journals.
If you already have an hypothesis, then design your fictitious experiment in the general manner described that you see in the journals. If you do not have one yet, then take a real hypothesis as described in your journal articles, and make alterations in it to fit your own requirements.
Once you have an hypothesis, either made up by you, or extracted with your own alteration from some real journal article, you are going to need to add in the basic parts of most experiment articles. What you write will be fictitious in terms of data and results of course, since you have not actually run any experiment, but I suggest you model the kind of data and results on actual journal articles if you can.
You will need an introductory section, which states the basic problem you are dealing with, and your hypothesis regarding that problem.
You should have a section on your materials and methodology, basically describing what you are doing, and how you are doing it.
Next write a results section, which states what happened when you "ran" the experiment.
After that a discussion section, that considers what you learned from the experiment, and what its meaning is in the wider of context of whatever it is that your hypothesis is dealing with.
Finally, write down a list of references.