Job Demands and Decision Latitude Scale

Abstract

The Job Demands and Decision Latitude scale is a foundational measure in occupational psychology, initially developed by Karasek (1979). Its primary function is to quantify the impact of stressful job characteristics on the physical and psychological health of employees. The scale operationalizes the core components of the Job Demands-Control (JDC) model.

This comprehensive measure is structured into two main independent constructs: Job Demands (seven items focusing on workload and time pressures, representing psychological stressors) and Decision Latitude (eight items). Decision Latitude further comprises two sub-components: four items assessing an employee’s skill discretion and four items assessing their decision authority regarding job-related tasks. The independent variability of these constructs in the work environment has been confirmed through subsequent research (Fortunato, Jex, & Heinish, 1999; Xie, 1996).

Keywords

Job Demands, Decision Latitude, Skill Discretion, Decision Authority, Occupational Stress, Karasek, JDC Model, Psychological Stressors, Employee Health, Workload.

Authors

Robert A. Karasek

Purpose

The fundamental purpose of the scale is to systematically assess the level of psychological demands imposed by a job environment and the corresponding level of control or discretion an employee possesses over their work processes. By measuring these two dimensions independently, the scale allows researchers to identify high-strain jobs (high demand, low control) which are theoretically linked to adverse physical and mental health outcomes.

The initial motivation for the scale’s creation was to establish an empirical link between specific job characteristics and the physical health consequences experienced by workers, thereby providing a tool with direct implications for job redesign, organizational intervention strategies, and stress prevention programs.

Construct

The scale measures two primary, independent psychological constructs central to occupational health research: Job Demands and Decision Latitude (often referred to as job control). The underlying theoretical framework is the Job Demands-Control (JDC) model.

• Job Demands: This subscale captures the intensity and quantity of work stressors, including factors such as workload, time constraints, pace, and conflicting requirements. It is composed of seven items.
• Decision Latitude (Job Control): This dimension reflects the employee’s capacity to influence their work environment. It is divided into Skill Discretion (the ability to use diverse skills and learn new things, measured by four items) and Decision Authority (the freedom to organize work and make strategic decisions about the job, measured by four items).

Validity

Extensive research confirms the validity of the Job Demands and Decision Latitude scale through analysis of its correlational patterns with established workplace and health variables. Work demands consistently demonstrated positive correlations with indicators of strain, including hours worked per week, measures of psychological distress, employee negative affectivity, and reports of somatic complaints (Chay, 1993; Moyle & Parkes, 1999; Parkes, 1990). Work demand was also found to correlate negatively with protective factors such as social support from managers and overall job satisfaction (Moyle & Parkes, 1999).

Conversely, Decision latitude exhibited positive correlations with favorable employment characteristics, including higher job level, increased hours worked per week, and greater job satisfaction (Chay, 1993; Moyle & Parkes, 1999; Xie, 1996). Crucially, higher decision latitude correlated negatively with employee somatic complaints (Chay, 1993; Xie, 1996), supporting the scale’s utility in measuring a protective factor against stress-related illness.

Reliability

The internal consistency of the Job Demands and Decision Latitude scale has been robustly demonstrated across various studies utilizing Coefficient alpha. For the Job Demands subscale, alpha values consistently ranged from 0.79 to 0.88, indicating high reliability and consistency among the seven demand items, suggesting that they effectively measure the same underlying construct.

The Decision Latitude (or job control) subscale also showed strong internal consistency, with alpha values ranging from 0.77 to 0.85 (Chay, 1993; Fortunato et al., 1999; Moyle & Parkes, 1999; Parkes, 1990; Westman, 1992; Xie, 1996; Zohar, 1995). These values generally surpass the acceptable psychometric standard of 0.70, validating the dependability of the measure across diverse occupational research settings.

Factor Analysis

The structural integrity of the scale was confirmed through factor analysis conducted by Xie (1996). This analysis examined the item structure and found that the items measuring job demands and those measuring decision latitude loaded clearly and distinctly onto two separate factors.

This empirical two-factor solution precisely mirrors the theoretical model suggested by Karasek (1979), affirming that Job Demands and Decision Latitude are statistically independent constructs. This finding is critical for the application of the JDC model, which relies on the interaction of these two distinct dimensions to predict strain and motivation outcomes.

Instrument

Test Type: Self-report questionnaire

Format: Paper-and-pencil or digital administration; uses a 5-point Likert-type scale.

Language Available: English (Original); widely translated for cross-cultural research.

Population Group: Working adults / Employees

Age Group: Typically 18+

Population Details: Applicable across various industries, occupations, and organizational levels where job characteristics related to demand and control are relevant.

Test Methodology: Respondents are asked to rate the frequency or extent to which specific job characteristics apply to their role, ranging from 1 (never) to 5 (extremely often).

Keywords

Occupational Health Psychology, Job Control, Work Stress, Reliability, Validity, JDC Model, Skill Utilization, Organizational Behavior, Karasek Model, Stress-Strain Hypothesis.

Authors

Author ORCID Identifier: N/A (Information not provided in source)

Affiliation Email addresses: N/A (Information not provided in source)

Correspondence Address: N/A (Information not provided in source)

Permissions & Fee and Test Year

Test Year: 1979

Permissions: The original items were reprinted with permission from the primary publication source (Karasek, 1979).

Fee: The scale is widely used in academic research and is often accessible for non-commercial purposes, though specific usage permissions may depend on the version utilized or institutional policies.

Reference’s

Karasek, R. A. (1979). Job demands, job decision latitude, and mental strain: Implications for job redesign. Administrative Science Quarterly, 24, 285-308. The items were taken from Appendix A, p. 307. Reprinted with permission.

Chay, Y. W. (1993). Social support, job demands and decision latitude in the prediction of psychological strain: A study of employed engineers. Journal of Organizational Behavior, 14(2), 117–130.

Fortunato, V. J., Jex, S. M., & Heinish, D. A. (1999). A comparison of the psychometric properties of three measures of job control. Educational and Psychological Measurement, 59(1), 110-123.

Moyle, P., & Parkes, K. R. (1999). The effects of job demands, control, and support on the stress experiences of nurses. Journal of Occupational and Organizational Psychology, 72(1), 1-22.

Parkes, K. R. (1990). Coping, dimensions of the Job Characteristics Inventory, and the demands-control model. Journal of Applied Psychology, 75(3), 278–286.

Westman, M. (1992). The role of social support in the stress-strain relationship: A study of Israeli teachers. Journal of Occupational and Organizational Psychology, 65(3), 209-221.

Xie, J. L. (1996). Job control and job demands: An examination of their independent and interactive effects on job satisfaction and psychological distress. Journal of Organizational Behavior, 17(3), 241-255.

Zohar, D. (1995). The effects of job demand and control on employee well-being in a manufacturing environment. Journal of Occupational and Organizational Psychology, 68(4), 365-375.

Items of the Job Demands and Decision Latitude scale

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

Responses are obtained using a 5-point Likert-type scale where 1 = never and 5 = extremely often.

Job demand items:

1. To what extent does your job require your working fast?
2. To what extent does your job require your working hard?
3. To what extent does your job require a great deal of work to be done?
4. To what extent is there not enough time for you to do your job?
5. To what extent is there excessive work in your job?
6. To what extent do you feel there is not enough time for you to finish your work?
7. To what extent are you faced with conflicting demands on your job?

Skill discretion items:

1. To what extent is high skill level required?
2. To what extent are you required to learn new things?
3. To what extent is your work non-repetitious?
4. To what extent does your job require creativity?

Decision authority items:

1. To what extent do you have the freedom to decide how to organize your work?
2. To what extent do you have control over what happens on your job?
3. To what extent does your job allow you to make a lot of your own decisions?
4. To what extent are you assisted in making your own decisions?