1. MEMORY PERSPECTIVES:
DATA ANALYSIS
Week 9 Practical

2. SAMPLING DISTRIBUTIONS
MEMORY PERSPECTIVES
WEEK 8 PRACTICAL
LECTURE 1
PRACTICAL
WEEK 1
NO LECTURE
NO PRACTICAL
WEEK 2
NONPARAMETRICS 1
1ST PRACTICAL
WEEK 3
NONPARAMETRICS 2
1ST ANALYSIS
WEEK 4
1ST ANALYSIS (BY HAND)
WEEK 5
SAMPLING DISTRIBUTIONS
2ND PRACTICAL
WEEK 6
HYPOTHESIS TESTING
2ND ANALYSIS
WEEK 7
RELATED T-TEST
2ND ANALYSIS (BY HAND)
WEEK 8
INDEPENDENT T-TEST
3RD PRACTICAL
WEEK 9
INDEPENDENT ANOVA
3RD ANALYSIS
WEEK 10
DEPENDENT ANOVA

3. BY THE END OF THE SESSION, YOU SHOULD BE ABLE TO:
MEMORY PERSPECTIVES
LEARNING OUTCOMES
BY THE END OF THE SESSION, YOU SHOULD BE ABLE TO:
Use SPSS to test the first hypothesis in the memory perspectives practical and interpret the output.
Use SPSS to test the second hypothesis in the memory perspectives practical and interpret the output.
Make a start on writing up your RESULTS and DISCUSSION sections for your lab report.

4. The first 2 columns show subject id and group membership.
MEMORY PERSPECTIVES
RESULTS
The first 2 columns show subject id and group membership.
The last two columns show recall for LIST A (BURGLAR) and LIST B (BUYER).
(Perspect 0 = BURGLAR; Perspect 1 = BUYER)

5. INTERVAL + BETWEEN Ss + 2 GROUPS Independent t-test
MEMORY PERSPECTIVES
RESULTS
Q1: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST A (burglar relevant items)?
INTERVAL + BETWEEN Ss + 2 GROUPS
Independent t-test
In SPSS, Independent t-test may be found under analysis > compare means > independent-samples t test.

6. INTERVAL + BETWEEN Ss + 2 GROUPS Independent t-test
MEMORY PERSPECTIVES
RESULTS
Q1: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST A (burglar relevant items)?
INTERVAL + BETWEEN Ss + 2 GROUPS
Independent t-test
SPSS would like to know what the test variables (DV) is. At the moment, we’re just interested in LIST A recall.
We also need to define our ‘grouping variable’ (IV) which is BURGLAR (0) or BUYER (1).
We have to tell SPSS that out first group is assigned to the number value 0 and the second group to the number value 1.

7. Now for the t-test: t(151) = 6.64, p < .001.
MEMORY PERSPECTIVES
RESULTS
Q1: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST A (burglar relevant items)?
INTERVAL + BETWEEN Ss + 2 GROUPS
Independent t-test
Levene’s test assesses whether our two groups have homogeneity of variance. If Levene’s is NON-SIGNIFICANT we assume equality.
Now for the t-test: t(151) = 6.64, p < .001.

8. Let’s repeat this exercise for the second hypothesis.
MEMORY PERSPECTIVES
RESULTS
Q2: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST B (home-buyer relevant items)?
INTERVAL + BETWEEN Ss + 2 GROUPS
Independent t-test
Let’s repeat this exercise for the second hypothesis.
In SPSS, Independent t-test may be found under analysis > compare means > independent-samples t test.

9. Everything else can stay as is.
MEMORY PERSPECTIVES
RESULTS
Q2: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST B (home-buyer relevant items)?
INTERVAL + BETWEEN Ss + 2 GROUPS
Independent t-test
Now, we’re interested in LIST B (buy_fea) recall rather than LIST A (burg_fea) recall, so switch these test variables around.
Everything else can stay as is.

10. And the t-test: t(151) = -3.90, p < .001
MEMORY PERSPECTIVES
RESULTS
Q2: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST B (home-buyer relevant items)?
INTERVAL + BETWEEN Ss + 2 GROUPS
Independent t-test
Once again, Levene’s test comes through for us, supporting equal variance between the burglars and the buyers.
And the t-test: t(151) = -3.90, p < .001

11. LIST A BURGLARS > BUYERS LIST B BURGLARS < BUYERS
MEMORY PERSPECTIVES
RESULTS
Q1: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST A (burglar relevant items)?
LIST A BURGLARS > BUYERS
Q2: Do ‘BURGLARS’ and ‘BUYERS’ have different levels of recall for LIST B (home-buyer relevant items)?
LIST B BURGLARS < BUYERS
What implications do these two hypotheses have for the memory perspectives account?

12. BY THE END OF THE SESSION, YOU SHOULD BE ABLE TO:
MEMORY PERSPECTIVES
LEARNING OUTCOMES
BY THE END OF THE SESSION, YOU SHOULD BE ABLE TO:
Use SPSS to test the first hypothesis in the memory perspectives practical and interpret the output.
Use SPSS to test the second hypothesis in the memory perspectives practical and interpret the output.
Make a start on writing up your RESULTS and DISCUSSION sections for your lab report.

13. THERE IS NO PRACTICAL SESSION IN WEEK 10
MEMORY PERSPECTIVES
THERE IS NO PRACTICAL SESSION IN WEEK 10
CLARIFY ANY OUTSTANDING ISSUES YOU HAVE WITH YOUR TUTORS NOW...

14. What are the flaws in this study?
MEMORY PERSPECTIVES
DISCUSSION
GET TOGETHER IN GROUPS OF THREE OR FOUR AND REFLECT ON TODAY’S EXPERIENCE USING THE FOLLOWING QUESTIONS
What are the flaws in this study?
Could I have made one-tailed hypotheses? How would this have changed the p value?
What do the inferential statistics NOT tell me about my results?