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--- public:rem4:rem4-18:design_of_comparative_experiments_i [2018/01/28 20:30] – thorisson
+++ public:rem4:rem4-18:design_of_comparative_experiments_i [2024/04/29 13:33] (current) – external edit 127.0.0.1
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-===Concepts===
+====Concepts====
 | Experimental design  | A planned interference in the natural order of events.  |
 | Subject(s)  | Subject of interest - that to be studied, whether people, technology, natural phenomena, or other  |
@@ Line 25: / Line 25: @@
 \\
-===Correlational Studies & Quasi-Experimental Design===
+====Correlational Studies & Quasi-Experimental Design====
 | Correlation  | Some factors/variables co-vary when changes in one variable are related with changes in the other, negative or positive  |
 | Correlation: Powerful tool  | Any variables in the world can be measured for correlation. Only two variables are needed (independent and dependent) for doing correlation studies  |
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-===Pilots===
+====Pilots====
 | What is it?  | A more loose, pre-study using the intended experimental design to tune it  \\ A pre-study intended to gauge the nature, scales or other factors of the variables to be measured, or the subject to be measured  |
 | Why and when  | Pilots are much more useful than you might think. Yes, it will increase the duration and effort of your experiment BUT: It can significantly improve the quality of the subsequent experiment in many cases. It will certainly clarify and sharpen the experimenter's understanding of one or more of: the experiment, experimental procedure, variables and subjects.  |
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-===Field Studies===
+====Field Studies====
 | What is it?  | Quasi-experimental design. To study a phenomeon "in the wild".  |
-| When  | When an experimental setup is out of the question.  |
+| When  | When a controlled experimental setup is not possible.  |
 | Example  | H1: "The popularity of Nokia phones has to do with the quality of their user interface." \\  H0: "The user interface has nothing to do with it."  |
 | How  | Try to approximate a true experimental design as possible, by randomizing where possible, and by controlling the independent variables, if possible. Make the best attempt possible at analyzing potential alternative variables related to the dependent variable to be measured.  |
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-===ABAB (aka Repeated Measures) ===
+====Repeated Measures (aka ABAB) ====
 | What is it?  | Repeated measurements of the same sample, varying the independent variables between sessions  |
 | When  | When control group is not possible; When the group of subjects is small or single-case (e.g. medical studies)  |
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 \\
-===Controled Experiment===
+====Controlled Experiment====
 | What is it?   | A fairly recent research method, historically speaking, for testing hypotheses / theories  |
 | When  | When it is possible to control and select everything of importance to the subject of study  |
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-===Usability Studies===
+====Usability Studies====
 | What is it?  | The study of human use of technology.  \\ Not an experimental design paradigm in and of itself, yet important enough to warrant special discussion  |
 | When  | When technology and/or its users are of interest  |
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 EOF