Specifically, the correlation should be +.70 or above for us to feel confident about the test-retest reliability of the happiness measure used in our survey.

Descriptive Statistics
	Mean	Std. Deviation	N
Overall Happiness Score (Sum of 4 Items)	19.00	5.110	93
Overall Happiness Score (Sum of 4 Items) on Measure 5 Weeks Later	19.81	5.361	69

Correlations
	Overall Happiness Score (Sum of 4 Items)	Overall Happiness Score (Sum of 4 Items) on Measure 5 Weeks Later
Overall Happiness Score (Sum of 4 Items)	Pearson Correlation	1	.744**
Sig. (2-tailed)		.000
Sum of Squares and Cross-products	2402.000	1294.354
Covariance	26.109	20.224
N	93	65
Overall Happiness Score (Sum of 4 Items) on Measure 5 Weeks Later	Pearson Correlation	.744**	1
Sig. (2-tailed)	.000
Sum of Squares and Cross-products	1294.354	1954.551
Covariance	20.224	28.743
N	65	69
**. Correlation is significant at the 0.01 level (2-tailed).

Answer following question

1. Based on the correlation coefficient between happiness score at Time 1 and Time 2, does the happiness measure appear to have sufficient test-retest reliability? In your response, report the Pearson r, and explain the criteria you used to make your determination.

Reliability data below to answer 2-3

An overall Cronhbach's of .70 or above usually provides sufficient evidence for high internal consistency across items on a measure.

Case Processing Summary
	N	%
Cases	Valid	93	94.9
Excludeda	5	5.1
Total	98	100.0
a. Listwise deletion based on all variables in the procedure.

Reliability Statistics
Cronbach's Alpha	Cronbach's Alpha Based on Standardized Items	N of Items
.838	.851	4

Inter-Item Correlation Matrix
	Item #1 on Subjective Happiness Scale (In general, I consider myself:)	Item #2 on Subjective Happiness Scale(Compared to most of my peers, I consider myself:)	Item #3 on Subjective Happiness Scale(Some people are generally very happy. They enjoy life regardless of whatis going on, gettin...	Happiness Scale Item #4 Reverse Coded
Item #1 on Subjective Happiness Scale (In general, I consider myself:)	1.000	.834	.726	.458
Item #2 on Subjective Happiness Scale(Compared to most of my peers, I consider myself:)	.834	1.000	.754	.373
Item #3 on Subjective Happiness Scale(Some people are generally very happy. They enjoy life regardless of whatis going on, gettin...	.726	.754	1.000	.382
Happiness Scale Item #4 Reverse Coded	.458	.373	.382	1.000

Item-Total Statistics
	Scale Mean if Item Deleted	Scale Variance if Item Deleted	Corrected Item-Total Correlation	Squared Multiple Correlation	Cronbach's Alpha if Item Deleted
Item #1 on Subjective Happiness Scale (In general, I consider myself:)	13.84	15.854	.816	.736	.745
Item #2 on Subjective Happiness Scale(Compared to most of my peers, I consider myself:)	14.39	14.588	.773	.743	.748
Item #3 on Subjective Happiness Scale(Some people are generally very happy. They enjoy life regardless of whatis going on, gettin...	14.48	14.644	.728	.603	.768
Happiness Scale Item #4 Reverse Coded	14.29	16.839	.436	.217	.906

Answer the following question

2. Based on the Cronhbach's Alpha statistic, does the four-item happiness measure appear to have sufficient internal consistency (inter-item reliability)? In your response, report Cronhbach's Alpha and explain the criteria you used to make your determination.

3. As you examine the Inter-Item Correlation Matrix and the Item-Total Statistics (Cronbach's Alpha if Item Deleted column) included in the Reliability Analysis output, it indicates that one of the four items on the happiness measure is not as strongly correlated as the other three items. Report which item (1, 2, 3 or 4) the output indicates as being a relatively weaker fit (i.e., not as strongly related with the others) in the measure and what the Cronbach's Alpha would be if this item were to be excluded from the scale.