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Section A Experiments

Section A Experiments. 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)

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Section A Experiments

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  1. Section AExperiments

  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. 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???

  5. 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.

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

  7. Key definitions 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. Alternate/Experimental Hypothesis H1

  8. 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.

  9. Key definitions 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 differencebetween gender (male and female) and IQ (measured by their score on a 100 pt IQ test). Null Hypothesis H0

  10. IV/DV WorksheetNull and Experimental Hypothesis In pairs identify the IV and DV and then the Experimental/Alternate Hypothesis and the Null Hypothesis

  11. Design TaskIdeas???? You have this info on your sheet. Always link your decisions to reliability and validity. 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)

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

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