In a controlled experiment,
an independent variable
(the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.
Which term refers to the causing variable that is manipulated by the experimenter in an experiment?
In a controlled experiment,
an independent variable
(the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.
Which variable is manipulated by the experimenter?
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.
What variable is expected to change as a result of the experimental manipulation?
Dependent Variable
The variable that depends on other factors that are measured. These variables are expected to change as a result of an experimental manipulation of the independent variable or variables.
Which experimental variable is intentionally manipulated to see how it influences the outcome of the experiment?
A controlled variable
is a variable that is intentionally kept constant so it won't influence the outcome of an experiment. By controlling any variables that could have an effect on the results of an experiment, we can be confident that the manipulated variable is responsible for our results.
What is a controlled experiment simple definition?
:
an experiment in which all the variable factors in an experimental group and a comparison control group are kept the same except for one variable factor in the experimental group that is changed
or altered …
How do you control variables in an experiment?
Variables may be
controlled directly by holding them constant throughout a study
(e.g., by controlling the room temperature in an experiment), or they may be controlled indirectly through methods like randomization or statistical control (e.g., to account for participant characteristics like age in statistical tests).
What are the 3 types of variables?
A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables:
independent, dependent, and controlled
.
What is the responding variable in an experiment?
A responding variable is
something that “responds” to changes you make in an experiment
. It's the effect or outcome in an experiment. … The responding variable is usually named in the title of the project or experiment.
Can variables be confounded in an experiment?
A confounding variable is
an “extra” variable that you didn't account for
. They can ruin an experiment and give you useless results. … A confounding variable can have a hidden effect on your experiment's outcome. In an experiment, the independent variable typically has an effect on your dependent variable.
How do we manipulate variables?
Again, to manipulate an independent variable means
to change its level systematically
so that different groups of participants are exposed to different levels of that variable, or the same group of participants is exposed to different levels at different times.
Which of the following is a way of controlling extraneous variables?
Randomization
is the preferred method for controlling extraneous variables.
Why is random so important for determining cause and effect?
Experiments are the best way to determine cause and effect relationships between these variables. … Randomly assigning subjects
helps to eliminate confounding variables
, or variables other than the independent variable that could cause a change in the dependent variable.
How do you manipulate independent variables?
Again, to manipulate an independent variable means
to change its level systematically
so that different groups of participants are exposed to different levels of that variable, or the same group of participants is exposed to different levels at different times.
What is the relationship between manipulated and responding variables?
The manipulated or independent variable is the one that you control. The controlled variable is the one that you keep constant. The responding variable or variables is
what happens as a result of the experiment
(i.e. it's the output variable).
What is the constant variable?
TL;DR: In a science experiment, the controlled or constant variable is
a variable that does not change
. For example, in an experiment to test the effect of different lights on plants, other factors that affect plant growth and health, such as soil quality and watering, would need to remain constant.
