Psychology · Year 11 · Psychological Research and Ethics · 4.º Período

Research Methodologies and Designs

A comprehensive review of experimental and non-experimental research designs used in psychology, including observational studies and self-reports.

TL;DR:This topic introduces students to the 'how' of psychology: the scientific methods used to gather reliable data. Students learn to distinguish between experimental research, which tests cause-and-effect, and non-experimental designs like observational studies, case studies, and self-reports. They learn to identify independent and dependent variables, as well as the importance of controlling for extraneous variables to ensure a 'fair test'.

• ACARA Content Descriptions
• ACHPSY19
• ACHPSY20

About This Topic

This topic introduces students to the 'how' of psychology: the scientific methods used to gather reliable data. Students learn to distinguish between experimental research, which tests cause-and-effect, and non-experimental designs like observational studies, case studies, and self-reports. They learn to identify independent and dependent variables, as well as the importance of controlling for extraneous variables to ensure a 'fair test'.

In the Australian Curriculum, there is a strong emphasis on being a critical consumer of research. Students learn that the choice of design depends on the research question and ethical considerations. This technical topic can feel dry if taught only through lectures. It comes alive when students are tasked with designing their own (hypothetical) investigations. This topic benefits significantly from collaborative problem-solving where students must justify their choice of method for a specific psychological question.

Key Questions

1. What are the key differences between experimental and non-experimental research?
2. How do psychologists select appropriate research designs?
3. What are the variables in a psychological experiment?

Watch Out for These Misconceptions

Common Misconception

All psychological research is an 'experiment'.

What to Teach Instead

Students use the word 'experiment' for everything. Teachers should use a 'sorting' activity to help them distinguish between true experiments (manipulating an IV) and non-experimental methods like correlations or observations.

Common Misconception

A case study can prove a cause-and-effect relationship.

What to Teach Instead

Students often over-generalise from one person. Using a 'limitations' checklist helps them see that while case studies provide deep detail, they lack the control needed to prove that X caused Y.

Active Learning Ideas

Inquiry Circle

Design a Study

Groups are given a research question (e.g., 'Does music help students study?'). They must decide on the design, identify the variables, and explain how they would select their participants from the Australian population.

50 min·Small Groups

Stations Rotation

Method Match-Up

Set up stations with different research scenarios. Students must identify if the scenario is an experiment, a case study, or an observational study, and list one strength and one weakness of that method.

40 min·Small Groups

Think-Pair-Share

The Variable Hunt

Show a short clip of a 'pop-science' news report. Students work in pairs to find the 'hidden' variables and discuss whether the report's conclusion is actually supported by the method described.

20 min·Pairs

Frequently Asked Questions

What is the difference between an independent and a dependent variable?

The Independent Variable (IV) is the factor that the researcher deliberately manipulates or changes to see its effect. The Dependent Variable (DV) is the factor that is measured to see how it changed in response to the IV. For example, in a study on sleep and memory, sleep is the IV and the memory test score is the DV.

When would a psychologist use a non-experimental design?

Non-experimental designs are used when it is unethical or impossible to manipulate the variables (e.g., studying the effects of long-term smoking) or when a researcher wants to observe behaviour in a natural setting without interference.

What is a 'representative sample' in Australian research?

A representative sample is a group of participants that accurately reflects the diversity of the larger population being studied (e.g., all Year 11 students in Australia). This includes a balance of genders, cultural backgrounds, and socio-economic statuses to ensure the results can be generalised.

How can active learning help students understand research methods?

Active learning turns students into researchers. By having them design their own mini-investigations, they encounter the 'messiness' of real science, like how to define a variable or how to avoid bias. This hands-on experience makes the terminology of research methods much more meaningful and easier to remember than just reading a list of definitions.