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C82MPR – Practical Methods 2 Dr Mark Haselgrove

C82MPR – Practical Methods 2 Dr Mark Haselgrove. PLEASE LOG IN WITH WINDOWS 7. Recapitulation. Blocking (Kamin, 1968). - Surprise is necessary for learning to take place. - Quantified by Rescorla & Wagner (1972): what you get – what you expect.

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C82MPR – Practical Methods 2 Dr Mark Haselgrove

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  1. C82MPR – Practical Methods 2 Dr Mark Haselgrove PLEASE LOG IN WITH WINDOWS 7

  2. Recapitulation Blocking (Kamin, 1968) - Surprise is necessary for learning to take place. - Quantified by Rescorla & Wagner (1972): what you get – what you expect - Unblocking: Increase/decrease in US strength after AX trials But, - Unblocking is Sometimes seen with a qualitative change in US after AX

  3. Blocking or no blocking.....WHY ? Betts Brandon & Wagner (1996) Associations entered into by A Will be weak upon testing X A U1 R1 C RC X U2 R2 Association entered into by X Will be STRONG upon testing X

  4. This Practical… The effect of changing the US on blocking in human participants Literature Search: Use Google Scholar In Google scholar, conduct a search: Search terms: blocking unblocking blocking OR unblocking AND Learning blocking OR unblocking AND Conditioning blocking unblocking AND human AND conditioning Poor search terms alone: too general

  5. This Practical… The effect of changing the US on blocking in human participants Getting the paper:

  6. This Practical… The effect of changing the US on blocking in human participants

  7. This Practical… The effect of changing the US on blocking in human participants

  8. This Practical… Goto: http://www.psychology.nottingham.ac.uk/staff/mxh/C82MPR/Week2 and download a file called Task.exe Ensure that : You are running either Windows XP or 7 (not Mac OS) You have a folder on the C: drive called temp If you don’t do either of these the task will not work

  9. The Task • Participants adopt the role of a Health and Safety Inspector • Presented with (fictitious) hospital patients who have become ill after eating certain meals. Meals = CSs Illness = US • Participants have to rate how dangerous the meals are on a 1-9 scale

  10. The Task: Design Trials in italics are filler trials

  11. The Task: Details • Food types (e.g. chicken, apple) randomised as A, B, C for each participant • Vomiting and Diarrhoea randomised as US1 and US2 for each participant • 10 trials with each type in Stage 1 5 trials with each type in Stage 2 1 presentation of each stimulus during the Test • Trial order randomised in each stage • Location (top/bottom) of food type randomised on each trial

  12. The Task: Data • Stored automatically to C:\temp • File called “participant number ”.csv (e.g.: 31.csv) • Double click to open in Microsoft Excel Homework • Get into groups of about 5 or 6 and run a total of about 30 participants • Discuss how you will run the experiment (at home, laptop, in dept?) • Consider debriefing Participants (give feedback on goals of experiment) • Be wary of overwriting data if using same PC

  13. General References • Bouton (2007) Good background to learning. Hardback, so expensive Pearce (2008) Excellent general introduction to learning theory and blocking

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