Question

What are some of the possible variables that should be controlled or they may affect the reliability of your results?

A) Independent variables
B) Dependent variables
C) Confounding variables
D) Extraneous variables

Answer 1

In a scientific experiment, several variables should be controlled to ensure the reliability of the results. These include independent variables, dependent variables, confounding variables, and extraneous variables.

Step-by-step explanation:

In a scientific experiment, several variables should be controlled to ensure the reliability of the results:

1. Independent variables: These are the variables that are manipulated or controlled by the experimenter. They are the main focus of the study and should be carefully controlled to observe their effects on the dependent variable.
2. Dependent variables: These are the variables that are being measured or observed to determine the effects of the independent variables. They are usually the outcome or response variable in the study.
3. Confounding variables: These are other variables that may unintentionally affect the dependent variable and interfere with the true relationship between the independent and dependent variables. They should be identified and controlled as much as possible.
4. Extraneous variables: These are additional variables that may have an impact on the dependent variable but are not the main focus of the study. They should be kept constant or controlled to minimize their influence.

By controlling these variables, researchers can ensure that any observed effects on the dependent variable are due to the manipulation of the independent variable and not other factors.