variables and types of variables in research pdf

Variables and types of variables in research pdf

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Variables: Definition, Types of Variable in Research

Operationalizing Variables

What Is the Meaning of Variables in Research?

The use and importance of variables:

In scientific research, scientists, technicians and researchers utilize a variety of methods and variables when conducting their experiments. In simple terms, a variable represents a measurable attribute that changes or varies across the experiment whether comparing results between multiple groups, multiple people or even when using a single person in an experiment conducted over time. In all, there are six common variable types.

Variables: Definition, Types of Variable in Research

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. It is the presumed effect. Independent Variable The variable that is stable and unaffected by the other variables you are trying to measure. It refers to the condition of an experiment that is systematically manipulated by the investigator.

By Dr. Saul McLeod , updated Variables are given a special name that only applies to experimental investigations. One is called the dependent variable and the other the independent variable. The independent variable is the variable the experimenter manipulates or changes, and is assumed to have a direct effect on the dependent variable. For example, allocating participants to either drug or placebo conditions independent variable in order to measure any changes in the intensity of their anxiety dependent variable.

Printable PDF k. Answer: A variable is an object, event, idea, feeling, time period, or any other type of category you are trying to measure. There are two types of variables-independent and dependent. Answer: An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure. For example, someone's age might be an independent variable. Other factors such as what they eat, how much they go to school, how much television they watch aren't going to change a person's age.

Operationalizing Variables

In this chapter you will learn:. In other words, they can have different values under different conditions or for different people. We use variables to describe features or factors of interest. In social work intervention research, variables might include characteristics of the intervention intensity, frequency, duration and outcomes associated with the intervention. Demographic Variables. Social workers are often interested in what we call demographic variables.

Published on November 21, by Rebecca Bevans. Revised on March 2, In statistical research, a variable is defined as an attribute of an object of study. Choosing which variables to measure is central to good experimental design. If you want to test whether some plant species are more salt-tolerant than others, some key variables you might measure include the amount of salt you add to the water, the species of plants being studied, and variables related to plant health like growth and wilting. You need to know which types of variables you are working with in order to choose appropriate statistical tests and interpret the results of your study.


There are different types of variables and having their influence differently in a study viz. Independent & dependent variables, Active and.


What Is the Meaning of Variables in Research?

Within the context of a research investigation, concepts are generally referred to as variables. A variable is, as the name applies, something that varies. Age, sex, export, income and expenses, family size, country of birth, capital expenditure, class grades, blood pressure readings, preoperative anxiety levels, eye color, and vehicle type are all examples of variables because each of these properties varies or differs from one individual to another. A variable is any property, a characteristic, a number, or a quantity that increases or decreases over time or can take on different values as opposed to constants, such as n, that do not vary in different situations. When conducting research, experiments often manipulate variables.

The use and importance of variables:

Our websites may use cookies to personalize and enhance your experience. By continuing without changing your cookie settings, you agree to this collection. For more information, please see our University Websites Privacy Notice. Currently, the term participant rather than subject is used when describing the people from whom we collect data. Ordinal, interval, and ratio variables are quantitative. Height in inches and scores on a test would be examples of quantitative variables.

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Types of Variable

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Understanding types of variables

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