AQA Psychology - Research Methods - Experimental Method
A research approach where one variable (the independent variable) is deliberately manipulated to see if it causes a change in another variable (the dependent variable), while maintaining high levels of control over extraneous factors to establish cause-and-effect relationships.
What is an experimental method?
Manipulating one variable to determine if change effects another variable
high levels of control
Key Terms
What is an experimental method?
Manipulating one variable to determine if change effects another variable
high levels of control
What is the research aim?
A general statement about what the researcher intends to investigate; the purpose of the study.
What is independent variables?
-Aspect of a situation is manipulated by research or naturally
What is dependent variable?
Variable in an experimental situation that is measured
- Should be caused by IV
What is operationalise?
Precise and clear about what is being manipulated or measure
Makes it testable and repeatable
What are the three hypothesis in psychology?]
Null hypothesis
Experimental hypothesis
Alternative hypothesis
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| Term | Definition |
|---|---|
What is an experimental method? | Manipulating one variable to determine if change effects another variable high levels of control |
What is the research aim? | A general statement about what the researcher intends to investigate; the purpose of the study. |
What is independent variables? | -Aspect of a situation is manipulated by research or naturally |
What is dependent variable? | Variable in an experimental situation that is measured - Should be caused by IV |
What is operationalise? | Precise and clear about what is being manipulated or measure Makes it testable and repeatable |
What are the three hypothesis in psychology?] | Null hypothesis Experimental hypothesis Alternative hypothesis |
What is a hypothesis? | Precise, testable statement - Predicts expected outcome |
What is a null hypothesis? | -No effect or relationship between variables being investigated |
What is an experimental hypothesis? | -In context of an experiment |
What is the alternative hypothesis? | Any hypothesis that is not the null hypothesis |
What can the experiment/alternative hypothesis be referred to? | Research hypothesis |
Why is it important to state a null hypothesis? | -Field (2004) impossible to prove experimental hypothesis possible to disprove null hypothesis |
What is a directional hypothesis? | States the direction in which the results are expected to go |
What is a directional hypothesis also know as? | One-tailed hypothesis |
What is a non-direcional hypothesis? | Does not give a predicted direction in which the results are expected to go |
What is the non-directional hypothesis also know was? | Two-tailed hypothesis |
Why would use directional hypothesis? | Past research suggests that the findings will go in a particular direction |
Why would you use a non-directional? | No past research or past research in contradictory |