Scientific Method Applications to Human Growth and Development Research

Lesson Transcript
Instructor: Lisa Roundy

Lisa has taught at all levels from kindergarten to college and has a master's degree in human relations.

The scientific method is a multi-step process that was developed to test hypotheses in the physical sciences; however, it is also used in social sciences as well. Researchers use the scientific method to explain changes in human growth and development. Updated: 09/15/2021

The Scientific Method Defined

A human growth and development researcher was observing children at a preschool. She noticed that the girls in the class tended to be better at coloring inside the lines. Since the researcher found this an interesting observation, she began to research any existing information that might be related to what she had seen.

Based on her observation and research, she made a guess about what was occurring: Three-year-old girls have better fine motor skills than three-year-old boys. She tested this idea by collecting coloring samples from three-year-old boys and girls at area preschools. Ten out of fifty three-year-old boys colored within the lines, and thirty out of fifty three-year-old girls colored within the lines. The researcher then wrote a report that outlined how the information she obtained supported her idea that three-year-old girls have better fine motor skills than three-year-old boys.

This is an example of the use of the scientific method in human growth and development research. The scientific method is a method of investigation used by researchers to identify a problem, observe associated variables, and collect data to reach conclusions about the problem.

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  • 0:05 The Scientific Method Defined
  • 1:17 Application in Human…
  • 2:59 Steps of the Scientific Method
  • 5:28 Lesson Summary
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Application in Human Development

The goal of human development researchers is to understand, describe, and predict changes that can occur throughout a person's lifespan. They must utilize the scientific method to conduct this research in order to validate the assumptions that are being made.

You have been hearing about the scientific method from as early as elementary school. However, most of your past experience with the process was probably not associated with the social sciences. Because of this, when you first heard the scientific method mentioned, you probably pictured a laboratory experiment involving chemicals or measuring the growth of plants in a controlled experiment. Is this the same process as in the social sciences?

The answer to this question is yes. The major elements of the scientific method are shared by both the social sciences and other types of science. The only major difference is that in the social sciences, such as the study of human growth and development, different methods of research are used more often. Assumptions and inferences must be allowed as well.

This is because people are much more difficult to understand, predict, and control than chemicals or laboratory conditions. There are also ethical concerns in the study of people. Because of the different methods of research used, results of the research in the field of human development can be a bit more complex, even though the basic scientific steps being applied are still the same.

The scientific method allows for human growth and development research to occur in an objective and systematic way. This means that the conclusions being reached will still be significant. In order to understand how researchers reach these conclusions, let's look more closely at the research process itself, as well as the basic steps that are used to conduct the research.

Steps of the Scientific Method

We are going to discuss five steps involved in the scientific method.

1. You will select an area that you want to research and learn more about it.

This may begin in a simple way, like making an observation. Then you have to learn what information already exists about the topic that you want to research. This is like the researcher in our previous example. She noticed that the girls in the class tended to be better at coloring in the lines. Then she began to research any existing information that might be related to what she had seen.

2. You will develop a hypothesis about what you want to investigate.

A hypothesis is a testable statement that is logically derived from theory or observation. Previous research is essential to helping you form this educated guess. In the previous example, our researcher guessed that three-year-old girls have better fine motor skills than three-year-old boys, based on her observation and research.

3. You will test your hypothesis.

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