A clinician wants to be able to assess the happiness of their clients, so they come up with 10 questions to ask in the hopes that these 10 questions can be used to measure happiness. The 10 items are:

1. I am a happy person

2. I am generally cheerful

3. I rarely feel blue

4. I often smile

5. I feel good most of the time

6. I am rarely sad

7. I often see the best in people

8. People would describe me as happy

9. I often have positive thoughts

10. I rarely feel sad

a, Looking over the list of 10 questions, how many dimensions do you think this set of questions has?

Now look at the correlation matrix

	Item 1	Item 2	Item 3	Item 4	Item 5	Item 6	Item 7	Item 8	Item 9	Item 10
Item 1	-
Item 2	.69	-
Item 3	0.82	0.68	-
Item 4	0.51	0.59	0.75	-
Item 5	0.62	0.94	0.81	0.99	-
Item 6	0.70	0.69	0.91	0.59	0.77	-
Item 7	0.01	0.03	0.00	0.06	0.07	0.08	-
Item 8	0.79	0.85	0.97	0.97	0.92	0.62	0.03	-
Item 9	0.73	0.90	0.65	0.76	0.94	0.83	0.04	0.78	-
Item 10	0.51	0.57	0.55	0.63	0.98	0.63	0.07	0.81	0.99	-

b, The clinician wanted to have a unidimensional assessment of happiness. Was the clinician successful? Why or why not?

c, If there are multiple factors, do any of the factors want to be correlated? If so, which factors?

d, Are there any "bad" items? If so, state which item(s) and why.