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Psychology Life Hack of the Week
How can you find a career that will truly satisfy you? Research suggests you should search for a job that fits with your beliefs and values in life rather than a job that you think you’ll enjoy (Jachimowicz, 2018).
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Experimental Research Methods Assessment
Top Tips Read the front of the exam paper and the questions carefully – underline key information. Apply your knowledge to the context – if a question says “in this study”, you MUST contextualise your answer.
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Read and complete the information on the front sheet.
You will have 30 mins to complete the exam. Those who have extra time will have + 7 mins. When you finish, close your paper and place it on the desk in front of you.
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The Sign Test: Recap
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Two from: The hypothesis predicts a difference: There will be a difference in the number of absences from work in the year following treatment as compared to the year before. The experimental design is repeated measures : The records of the same participants are compared before and after treatment. The data is nominal: Patients are assigned to categories of ‘improved’, ‘deteriorated’ and ‘neither. S = 5 – the least frequent sign. There are 5 minus signs, 12 plus signs and 3 0s (which are disregarded).
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The calculated value of S = 5 is more than the critical value of 4 where N = 17 (20 minus the three 0 scores). Therefore the calculated value is not significant at the 0.05 level for a two-tailed test.
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Experimental vs Non-experimental Research Methods
Lab Field Natural Quasi Non-Experimental Correlation Observation Interviews Questionnaire Case Studies Content Analysis
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Discuss: What do you know already about correlations?
What is a correlation and what types are there? How does a scattergram show the strength of a correlation? How would you write a directional and a non-directional hypothesis for a correlation? What are the differences between correlations and experiments? What does a correlation co-efficient tell us?
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What is a correlation and what types are there?
‘Correlation’ refers to the relationship between two co- variables: Changes in one variable go along with changes in the other.
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How does a scattergram show the strength of a correlation?
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What does a correlation co-efficient tell us?
A correlation coefficient is a number that tells us … + O.3 Whether the correlation is POSITIVE or NEGATIVE How STRONG the relationship is. What does a correlation co-efficient tell us?
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How would you write a directional and a non-directional hypothesis for a correlation?
“There will be a correlation between number of cans of Red Bull consumed and anxiety score.” Directional: “There will be a positive correlation between number of cans of Red Bull consumed and anxiety score.”
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What are the differences between correlations and experiments?
Experiments have an IV and a DV, whereas correlations have two co-variables. Experiments establish cause and effect whereas correlations show the strength of the relationship between co-variables. Experimental hypotheses predict differences whereas correlational hypotheses predict relationships. What are the differences between correlations and experiments?
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Over to you … Read through the lesson handout and, as you go, complete tasks 1-5. Work on your own or with your neighbour(s). Finished? Ask me for the additional sheet, so you can self-mark your answers.
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Design a Study Design a study using correlational analysis
Identify the operationalised co-variables State the aim of the study Write an appropriate directional or non-directional hypothesis Choose a sampling technique and justify your choice. Identify potential extraneous variables that could affect you study. Identify any ethical issues and say how you would deal with them. Possible studies: The correlation between exercise and happiness; the correlation between chocolate price and how much people like it. .
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