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The Job Responsibilities Scale: invariance in a longitudinal prospective study
1Boston College, School of Education, Chestnut Hill, MA 02467, USA. ludlow@bc.edu
Journal of Outcome Measurement
|November 6, 1998
Summary
The Job Responsibilities Scale remained consistent between 1993 and 1995, indicating stable relationships among medical technology tasks despite changes in task frequency. This supports defining career progression for medical technologists.
Area of Science:
- Healthcare Management
- Psychometrics
- Medical Laboratory Science
Background:
- Assessing the stability of measurement tools is crucial in longitudinal studies.
- Understanding job responsibilities in medical technology is key for career development.
Purpose of the Study:
- To determine the invariance of the Job Responsibilities Scale from 1993 to 1995.
- To validate the scale's consistency over time for medical technology professionals.
Main Methods:
- Factor analyses were performed on data from both 1993 and 1995.
- Rasch rating scale analyses were utilized to compare item estimates between the two years.
Main Results:
- Nearly identical factor patterns were identified for both years.
- Virtually identical pairs of item estimates were found through Rasch analyses.
- Task relationships remained invariant despite increased performance frequency.
Conclusions:
- The Job Responsibilities Scale demonstrates high invariance between 1993 and 1995.
- Findings support the objective definition of career mobility patterns for entry-level medical technologists.
- The study provides a stable framework for understanding job responsibility progression in medical technology.