RM IV, DV, Hypothesis AQA GCSE Psychology

Research
Methods

●Understand independent and dependent variables.

●Understand extraneous variables.

●Be able to formulate testable hypotheses – including null hypothesis and alternative hypothesis.

Poll

I feel confident in defining Independent and Dependent variables

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I can write a hypothesis

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I know the difference between a Null Hypothesis and an Alternative Hypothesis

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I know what Extraneous Variables are

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I understand why it's important to consider extraneous variables

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Hypothesis

Null: A change in the IV will not have an impact on the DV

Alternative: A change in the IV will have an impact on the DV

Drag and Drop

An ​

Placeholder

is a variable that the researcher ​

Placeholder

to see if it has an effect on another variable.

A ​

Placeholder

is a variable that the researcher ​

Placeholder

to see if has been impacted by a change in another variable.

Drag these tiles and drop them in the correct blank above

Independent Variable

manipulates

Dependent Variable

measures

Extraneous Variable

controls

Confounding Variable

ignores

Multiple Choice

What is an independent variable?

• A variable the researcher measures

• A variable the researcher manipulates

• A variable the researcher controls

• A variable the researcher tests

Multiple Choice

What is an dependent variable?

• A variable the researcher measures

• A variable the researcher manipulates

• A variable the researcher controls

• A variable the researcher tests

Multiple Choice

What is an extraneous variable?

• A variable the researcher measures

• A variable the researcher manipulates

• A variable the researcher controls

• A variable the researcher tests

IV, DV & EV

Independent Variables

Dependent Variables

Extraneous Variables

Multiple Choice

What is the IV in this hypothesis?

Alcohol effects reaction time.

• Units of alcohol consumed

• Time spent drinking

• Length of time taken to react

• The number of reactions

Multiple Choice

What is the DV in this hypothesis?

Men with beards are perceived as older than men without beards.

• Weather or not the men have beards

• The age the men began growing their beards

• The age other people guess the men to be

• The actual age of the men

Multiple Choice

What is the IV in this hypothesis?

Watching tropical fish is relaxing.

• The number of tropical fish in a tank

• The number of minutes spent watching tropical fish

• How relaxed the participants report feeling

• How many tropical fish are owned by the particapant

Multiple Choice

What is the DV in this hypothesis?

The faster you type, the more mistakes your make.

• The job of the participant

• The number of words typed per minute

• The number of correctly typed words

• The number of errors made

Multiple Choice

Which of the following would not be an extraneous variable for this hypothesis?

Anxiety affects the level of adrenaline in the blood.

• The diagnosis of an anxiety disorder

• If the participants takes beta-blockers (inhibits adrenaline)

• The amount of adrenaline present

• The amount of exercise the participant gets

Multiple Choice

Which of the following is likely to be an extraneous variable for this hypothesis?

Right handed people write faster than left handed people.

• Age

• Height

• Handedness

• Eye colour

Summary

1. Distinguish between a null and alternative hypothesis

2. What is a dependent variable?
3. What is an independent variable?
4. Why do we control extraneous variables?

Open Ended

A researcher wants to investigate if homework improves student grades. Write an alternative hypothesis for this study.

Poll

I feel confident in defining Independent and Dependent variables

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I can write a hypothesis

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I know the difference between a Null Hypothesis and an Alternative Hypothesis

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I know what Extraneous Variables are

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree

Poll

I understand why it's important to consider extraneous variables

• Strongly Agree

• Agree

• Disagree

• Strongly Disagree