1. Section A Experiments

2. Example Section A
1.State the null hypothesis for your practical project. (4)
2.Describe a method you would use to conduct your practical project. (19)
3.Give an advantage of using an alternative experimental design in this practical project. (3)
4.Assess the validity of your investigation in measuring the dependent variable. (6)
5.Outline how you could select a sample which would be representative. (3)
6.What ethical issues would you consider in designing your practical project? (3)
7.Suggest one idea for possible future research related to your practical project. (3)

3. Experiments What can you remember about:
The key features of the experimental method
How you control variables
What the strengths and weaknesses of experiments are
What are the different types of experimental design?
Ext: strengths and weaknesses of types of experimental design
Experiments
LOs:
To recap key information about experiments
To evaluate the strengths and weaknesses of the experimental method
To apply this knowledge to the exam

4. Types of experiment
Lab
Field
Quasi
Remind me what these are???

6. Types of design
Independent measures
Repeated measures
Matched pairs
Complete the description and evaluation worksheets. This is revision so should not take you more than 15 minutes.

7. Key definitions Independent variable: Dependent variable:
E.g. red blood cell count

8. Alternate/Experimental Hypothesis H1
Key definitions
Alternate/Experimental Hypothesis H1
A hypothesis is a testable, predictive statement. The hypothesis will state what the researcher expects to find out.
When a hypothesis predicts the expected direction of the results it is referred to as a one-tailed hypothesis.
When a hypothesis does not predict the expected direction of the results it is referred to as a two-tailed hypothesis.

9. How you should formulate your alternate or experimental hypothesis:
There will be a significant difference between IV (operationalised) and DV (operationalised)
There will be a significant difference between gender (male and female) and IQ (measured by their score on a 100 pt IQ test).
Females will have a significantly higher IQ (measured by their score on a 100 pt IQ test) than males.

10. Key definitions Null Hypothesis H0
The null hypothesis is not the opposite of the alternate hypothesis it is a statement of no effect.
The null states that there will be no difference as a result of the IV.
There will be no difference between gender (male and female) and IQ (measured by their score on a 100 pt IQ test).

11. IV/DV Worksheet Null and Experimental Hypothesis
In pairs identify the IV and DV and then the Experimental/Alternate Hypothesis and the Null Hypothesis

12. Design Task Ideas???? You have this info on your sheet.
In groups outline your experiment
What is your research question?
Aims
Design and why it is good
Target population and expected sample
Sampling technique
IV and DV
Groups and allocation to them
Materials used
Procedure
What extraneous variables there might be
How you will control extraneous variables
Ethical issues to be considered
What form your data will take – how will you collect it and how will you analyse it?
Will you have a control group?
Inferential Statistics (we will cover this separately later)
You have this info on your sheet.
Always link your decisions to reliability and validity.

13. Plenary
Explain your research idea to the rest of the class.