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Table: Reliability Coefficients of the Various Scales Within The World of Work Inventory

Coefficient Alpha's with Spearman-Brown corrections applied were used to determine the reliability coefficients of the various scales. A reliability coefficient had to be computed for each scale as no summing over scales is possible as each is homogenous. The coefficient alpha method provides the mean reliability of all possible split-half reliabilities. The instrument was developed as a power test and therefore allows for this most sophisticated method of determining split-half reliability.

A carefully selected stratified sample was chosen to determine the overall reliability of each scale. The sample was composed of approximately fifty-eight percent females and forty-two percent males representative of age groups from 14 through age 62. The formal education level ranged from grade 8 through grade 17. Blacks, Hispanics, Native Americans and Whites, both males and females were represented in each group. The sample was also composed of persons raised in the North, East, North Central, Northwest, Southwest, South Central and South Eastern parts of the United States.

N = 738: representative of age 14 through age 62, geographical makeup of the country, education level from grade 8 through 16+, Whites, Blacks, Hispanics, Native Americans and approximately 58% females and 42% males

Reliability Coefficients of Career Interest Activity Scales

		Reliability Coefficients
1	Public Service	.8894
2	The Sciences	.8869
3	Engineering	.9218
4	Business Relations	.9072
5	Managerial	.9017
6	The Arts	.8804
7	Clerical	.8114
8	Sales	.9037
9	Service	.8773
10	Primary Outdoor	.9167
11	Processing Work	.9070
12	Machine Work	.9047
13	Bench Work	.8863
14	Structural Work	.8944
15	Mechanical & Electrical Work	.9399
16	Graphic Arts	.9007
17	Mining	.9300

Reliability Coefficients of Job Satisfaction Indicators

	Reliability Coefficient
Versatile	.8189
Adaptable to Repetitive Work	.8317
Adaptable to Performing Under Specific Instructions	.8611
Dominant	.8713
Gregarious	.8395
Isolative	.8811
Influencing	.8862
Self-Controlled	.8316
Valuative	.8073
Objective	.8418
Subjective	.8901
Rigorous	.8664

Reliability Coefficients of Vocational Training Potentials

	Reliability Coefficient
Verbal	.9418
Numerical	.9147
Abstractions	.9017
Spatial-Form	.8890
Mechanical-Electrical	.8904
Clerical	.9323