There are many types of variable but the most important, for the vast majority of research methods, are the independent and dependent variables. A researcher must determine which variable needs to be manipulated to generate quantifiable results.
https://explorable.com/research-variables
What is a variable - and what's not? A variable is a characteristic or feature that varies, or changes within a study. If a study compares three different diets, but keeps all 3 diets the same in the amount of sodium, then sodium isn't a variable in that study - it's a constant.
http://www.pt.armstrong.edu/wright/hlpr/text/3.1.variables.htm
Dependent and independent variables. (Redirected from Manipulated variable) For dependent and independent random variables, see Independence (probability theory). In mathematical modelling and statistical modelling, there are dependent and independent variables. The models investigate how the former depend on the latter. The dependent variables represent the output or outcome whose variation is being studied. The independent variables represent inputs or causes, i.e. potential reasons for variation.
https://en.wikipedia.org/wiki/Manipulated_variable
What is a variable - and what's not? A variable is a characteristic or feature that varies, or changes within a study. The opposite of variable is constant: something that doesn't change. In math, the symbols x , y or b represent variables in an equation, while pi is a constant.
http://www.pt.armstrong.edu/wright/hlpr/text/3.1.variables.htm
Developmental researchers are interested in understanding a. how people change over time. b. age-related changes. c. age-related differences or variations. d. all of these. ANSWER: D .
https://www.coursehero.com/file/12068786/Which-variables-are-manipulated-by-the-researcher/
In a study of how different doses of a drug affect the severity of symptoms, a researcher could compare the frequency and intensity of symptoms when different doses are administered. Here the independent variable is the dose and the dependent variable is the frequency/intensity of symptoms.
https://en.wikipedia.org/wiki/Manipulated_variable
The Dependent and Independent Variables. In a psychology experiment: The independent variable is the variable that is controlled and manipulated by the experimenter. For example, in an experiment on the impact of sleep deprivation on test performance, sleep deprivation would be the independent variable. The dependent variable is the variable that is measured by the experimenter.
https://www.verywell.com/what-is-a-variable-2795789
You can use this typical form to determine the independent and dependent variables from the title of the study. If the study title is in the form The effects of X on Y in Z. X is the independent variable and Y is the dependent variable - the outcome, and Z is the type of subjects represented.
http://www.pt.armstrong.edu/wright/hlpr/text/3.1.variables.htm
dependent variables b. independent variables c. codependent variables d. confounding variables ANSWER: B The term used to refer to a group of people who experience the same event or were born during the same timeperiod is a. age effect. b. time-of-measurement effect. c. practice effect. d. cohort effect.
https://www.coursehero.com/file/12068786/Which-variables-are-manipulated-by-the-researcher/
The independent variable is the core of the experiment and is isolated and manipulated by the researcher. The dependent variable is the measurable outcome of this manipulation, the results of the experimental design. For many physical experiments, isolating the independent variable and measuring the dependent is generally easy.
https://explorable.com/research-variables
which type of variable is manipulated by the researcher?
An independent variable is manipulated by a researcher.