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Experiment 1

Experiment 1. Miller (56) Capacity of STM 2-3 lessons + Home Study Cognitive – Unit 1. Purpose of experiments. To understand the purpose of Ψ To recognise the difficulty in getting exact data To criticise experimental design To design, or vary designs, yourself

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Experiment 1

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  1. Experiment 1 Miller (56) Capacity of STM 2-3 lessons + Home Study Cognitive – Unit 1

  2. Purpose of experiments • To understand the purpose of Ψ • To recognise the difficulty in getting exact data • To criticise experimental design • To design, or vary designs, yourself • To work through A-P-F-C in practice • To remember key core studies in special depth We will do few experiments, but in detail. You need to understand other studies through this lens.

  3. Instructions • Have a pen always in hand. • Have a piece of paper numbered 1 - 8 down one side and 9-16 down the middle. Space the rows. • You will be shown a series of slides with sequences of letters and / or numbers. The duration of each slide will be VERY SHORT. • You cannot write while a slide is up. Once the screen turns white, write the sequence QUICKLY, then look straight back up again. Do not be neat. • Do not attempt to “go back” – it’s too fast.

  4. Ready…

  5. B Q 7

  6. 9 G M

  7. J P 1 S

  8. Y 6 W C

  9. P 3 B 9 A

  10. 6 8 1 H K

  11. L 9 F N 8

  12. U 4 D W 2

  13. 7 Q N R T 3

  14. T 8 J Z 9 F

  15. 8 M F 4 E L H

  16. N F X 8 K 3 P

  17. U C 8 E 3 J 1 L

  18. S 9 K 4 G V 2 R

  19. H G 8 W K 1 C L A

  20. Y V W 8 N 9 D 4 S

  21. You have finished. Relax.

  22. DON’T SCORE IT YET Discuss your impressions of what it felt like. Make good detailed notes of how it felt for you and others – A good experimenter MUST EXPERIENCE THE EXPERIMENT as it affects participants, in order to understand issues in the design.

  23. Check your answers & report • 7QNRT3 • T8JZ9F • 8MF4ELH • NFX8K3P • UC8E3J1L • S9K4GV2R • HG8WK1CLA • YW8N9D4S • BQ7 • 9GM • JP1S • Y6WC • P39BA • 681HK • LFN8 • U4DW2 How many did you score? Are there any problems scoring?

  24. Reflect • What is the study testing? • What effects did the procedures impose on the participants? Why? Did they work as intended? • What variations are there between individuals? • What trends are emerging in results? • How would you represent the data? What conclusion can you draw from these findings?

  25. Miller (1956), after Jacobs (1887) • “The Magical Number 7, +/- 2” • Tested by digit span technique • Capacity of STM is 5-9 items, varying by individual • Constrained to focus on STM • Important not to allow meaning to occur: “U A E 2 0 1 1 D B S” “1914191819391945” (“chunking”)

  26. Now… Do it again. Exactly the same. All over again. Get your clean sheet of paper ready.

  27. Instructions • Have a pen always in hand. • Have a piece of paper numbered 1 - 8 down one side and 9-16 down the middle. Space the rows. • You will be shown a series of slides with sequences of letters and / or numbers. The duration of each slide will be VERY SHORT. • You cannot write while a slide is up. Once the screen turns white, write the sequence QUICKLY, then look straight back up again. Do not be neat. • Do not attempt to “go back” – it’s too fast.

  28. Ready…

  29. B Q 7

  30. 9 G M

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