EXERCISE 1

PSYCHOLOGICAL MEASUREMENT (806)

AUGUST 25, 1998

DUE SEPTEMBER 1, 1998

DIRECTIONS -- Use the information from the forty subjects and seven variables (Parts I to VII) on the attached sheet as data for the following problems. You can do this by hand, but I suggest you set up an SPSS-X file (main frame or PC) to do the computations (or use some other program, e.g., SAS). (Note, if you do not have the skills to do this, talk to me and I will assign a helper).

1. Compute the following for the first 20 and second 20 subjects for all seven variables (you need to use at least two procedures to do this):

a) Means, standard deviations, variances, ranges, frequencies, skews, kurtosis.

b) Pearson Product Moment correlation's between and among all variables.

2. Tell me what you know, given the above information, about these tests and samples.

3. Tell me what you know about the similarities and differences between the two samples. Produce a statistical test(s) that would support your views.

4. If the test scores for Part II were missing for sample 2 (the second twenty subjects), how might your knowledge of sample 1 help you to fill in the missing scores? Do it! (This can be done by hand or by the computer.) THINK AHEAD TO THE NEXT SEVERAL CHAPTERS!

You need to turn in the output or your computation sheets.

If you have questions, ask me.

KEEP A COPY OF THE DATA SHEET AND THE COMPUTER FILE; YOU WILL NEED THIS DATA SHEET LATER FOR ANOTHER EXERCISE.

Exercise:

Subject No:	Part I Verbal Comprehension	Part II Reasoning	Part III Numerical Operations	Part IV Perceptual Speed	Part V Spatial Orientation	Part VI Spatial Visualization	Part VII Mechanical Knowledge
1	22	11	24	29	27	39	30
2	8	5	22	40	16	23	21
3	19	6	44	36	14	12	21
4	32	8	72	32	21	20	33
5	13	2	25	46	25	20	29

6	24	5	30	47	2	6	8
7	22	4	38	49	15	37	35
8	35	1	54	53	34	28	16
9	18	7	37	51	37	46	30
10	13	10	61	50	38	46	35

11	53	23	56	45	22	41	38
12	15	9	42	48	18	5	18
13	34	18	30	25	40	58	46
14	15	2	42	48	12	21	17
15	27	4	28	28	31	26	24

16	19	9	32	40	11	13	19
17	29	4	24	37	26	0	27
18	24	9	42	58	21	21	23
19	27	9	54	54	23	20	30
20	16	5	42	44	29	24	34

21	56	12	67	48	20	40	26
22	22	5	58	48	28	41	20
23	32	4	57	33	20	4	16
24	18	8	49	47	19	36	42
25	24	15	87	52	36	34	26

26	22	12	14	48	25	16	27
27	22	10	38	46	21	0	20
28	21	21	32	33	11	43	37
29	13	10	52	40	29	35	11
30	23	3	60	49	43	13	37

31	2	10	29	49	10	21	27
32	20	4	50	55	22	8	27
33	25	11	76	43	26	20	26
34	14	6	40	38	35	8	46
35	11	2	32	56	37	4	26

36	2	9	61	45	20	10	20
37	38	17	56	67	25	20	35
38	16	6	61	42	29	23	21
39	14	4	17	44	26	7	21
40	23	25	61	48	23	29	16

*Part I is a vocabulary test; part II is composed of arithmetic-reasoning problems; part III is composed of simple number operations; part IV is on matching visual objects differing very little; part V involves awareness of spatial relationships; part VI requires imagination of an object turned in space; and part VII is on common knowledge of the correlations in this particular sample will be found to be generally low except between I and II and between V and VI.