Psychology Life Hack of the Week Want to get to know someone better? Make them laugh. Laughter increases people’s willingness to disclose personal information, which in turn, is critical to relationship development (Gray et al., 2015)

Your Research Report is due … Cburns@sussexcoast.ac.uk

Challenge: evaluate the design of my experiment using key terminology. Starter: Discussion recap With the person next to you, discuss the following : I would like to find out if watching a Disney film makes people happier than watching a documentary about creating animated films. I get people to watch both films and rate their happiness on a scale of 1-10 after each film. Identify the experimental design used in my study. Identify the type of experiment used. Justify your decision. Explain one strength and one weakness of each experimental design. Challenge: evaluate the design of my experiment using key terminology.

All students will explore the different sampling techniques. Lesson 7: Sampling All students will explore the different sampling techniques. All students will identify the strengths and weaknesses of the different sampling techniques. All students should complete exam practice questions on sampling techniques. All students could discuss implications of sampling techniques, including bias and generalization.

Exam Practice: Improve the Answer Consider the answers Morticia has given to the questions (1a and 1b). Explain what’s right/wrong with her answers (make notes in the space around the answer) Have a go at improving the answers: Page 2

‘Random’ = Each item in a population has an equal chance of being selected. https://www.random.org/lists

1. OLIVIA 2. AMELIA 3. ISLA 4. EMILY 5. AVA 6. LILY 7. MIA 8. SOPHIA Your population to select a random sample from – the UK’s top 50 names 2018 (so far!) 1. OLIVIA  2. AMELIA  3. ISLA 4. EMILY 5. AVA  6. LILY 7. MIA 8. SOPHIA 9. ISABELLA 10. GRACE 11. POPPY 12. ELLA 13. EVIE 14. CHARLOTTE 15. JESSICA 16. DAISY 17. SOPHIE 18. FREYA 19. ALICE 20. SIENNA 21. IVY 22. HARPER 23. RUBY 24. ISABELLE 25. WILLOW 1. OLIVER  2. HARRY  3. JACK  4. GEORGE 5. NOAH 6. CHARLIE 7. JACOB 8. ALFIE  9. FREDDIE 10. OSCAR 11. LEO 12. LOGAN 13. ARCHIE 14. THEO 15. THOMAS 16. JAMES 17. JOSHUA 18. HENRY 19. WILLIAM 20. MAX 21. LUCAS 22. ETHAN 23. ARTHUR 24. MASON 25. ISAAC 

Populations and Samples If the sample is representative, you can generalise the results of your study to the target population.

Every member of the population has an equal chance of being chosen. Random Sampling Every member of the population has an equal chance of being chosen. Involves identifying everyone in the target population and then randomly selecting the number of participants you need

Opportunity Sampling Common Room Geek! Want to be in my study? Common Room Taking the sample from people who are available (nearest/easiest to obtain) when the study is carried out.

Volunteer Sampling Psych Lab Volunteers needed for psychological study on learning I just love to be helpful…. I’ve always wanted to be in a study…. Sounds rubbish… Gotta do my hair.. Psych Lab Participants become part of a study because they volunteer e.g. in response to an advert.

Every nth person is selected from a list of the target population Systematic Sampling Every nth person is selected from a list of the target population

Stratified Sampling = 60% female 40% male = 60% female 40% male Identifying subgroups in the population then randomly selecting participants from the subgroups in the same proportions as they are in the population.

Sampling with Skittles Group C Group A Olivia Amy Emma Joe Izzy Jess Yvette Rebecca Group B Faith Henry Lauren Harry Group D Nancy Chloe Patrik Lucy 4. Alexa

Your Target Population: Tip all the sweets out of the boxes and record how many of each colour there are in the table below: Divide the number of each colour by the total number of sweets and then multiply by 100. Page 6

Page 6-8 Use your Skittles to demonstrate: 1. A random sample 2. An opportunity sample 3. A volunteer sample 4. A systematic 5. A stratified sample Follow the instructions on the handout. Challenge: Which of the samples most closely represents the target population? What does this tell you about the strengths and weaknesses of the different sampling techniques? Challenge extra: Express your results as fractions too.

Evaluating Sampling Techniques Using the grid, match the description, advantages and disadvantages with each sampling technique. AO3 Page 9

Answer on your whiteboard Answer on your whiteboard. Don’t reveal your answer to ANYONE until I say so! 1. A researcher wants to investigate the attitudes of Tory voters to NHS reforms. What is the target population in this study? 2. A researcher wants to investigate the effect of separation on infant monkeys. What is the target population? 3. A headteacher of a secondary school wants to study students’ views of proposed changes to their uniform. There are 2,500 students in the school and she decides to use a sample of 125. What percentage of the target population is in the sample? Show your workings. 4. How could the headteacher select a random sample? 5. Heat magazine invites readers to respond to a questionnaire about their sexual habits. Think of 3 ways in which the sample is likely to be biased.

Read the exam practice question on page 10: A Level Paper 2 (7182/2) Specimen Materials – First Set Answer questions 15, 16 and 17.

Now complete the rest of the exam practice questions.

Independent study ideas: Create a glossary list or flashcards of the key terms we have covered this lesson. Review the information on sampling in your textbook. Make brief notes and answer the exam practice questions to test your knowledge further. Use your knowledge of sampling techniques to create a quiz or exam practice questions for your desk mates. Give answers or a mark scheme on a separate sheet.

Psychology Pictionary Plenary: Psychology Pictionary Work in pairs/threes: Draw a picture that represents one of the sampling techniques on your mini-whiteboard. The rest of the table has to correctly guess the technique. Be creative!