What a Variable Is
What a Variable Is
Variable
Anything that can change in a study and take more than one value or state.
Constant
Anything that stays the same across the study. Teacher, classroom, time of day, textbook are often constants.
Why naming variables matters
If you cannot name what you change and what you measure, your study is not researchable.
What a Variable Is
A variable is anything that can vary, that is, anything that can take more than one value or state.
In a classroom, just about anything is a variable. Some examples:
- Teaching method (lecture, group work, flipped, peer learning).
- Test scores (any number from 0 to 100).
- Attendance (present or absent).
- Time spent on homework (zero minutes to several hours).
- Student motivation (high, medium, low, or measured on a five-point scale).
- Number of times a student speaks in class per week.
- The student’s first language. Treat language data respectfully; collect it only when it is relevant to the study.
The opposite of a variable is a constant: something that does not change in the study. The classroom itself, the time of day, the teacher, the textbook, often stay constant across the study. The study works by changing one thing (the independent variable) and watching what happens to another thing (the dependent variable), with everything else kept as constant as possible.
Why naming variables matters
In a research proposal, the reader expects you to identify your variables clearly. If you cannot name what you are changing and what you are measuring, your study is not researchable.
Write them in one short paragraph in your proposal. For example: The independent variable in this study is peer feedback on essay introductions. The dependent variable is the quality of student essay introductions, measured by a five-point rubric.
That paragraph proves the study has a clear shape.
A second card to fix the test a reader applies to your proposal in the first reading.
