CIEE CIEE Psychosocial & Organizational Ergonomics 1 — Questions and Answers
Question 1: Which psychosocial work factor is most consistently linked to increased risk of musculoskeletal disorders (MSDs) in occupational research?
- Commute time and transportation mode
- High job demands combined with low decision-making authority (job strain) (Correct answer)
- Worker age and gender
- Facility lighting levels below 500 lux
Correct answer: High job demands combined with low decision-making authority (job strain)
The Karasek job strain model demonstrates that the combination of high psychological demands and low job control (decision latitude) significantly increases MSD risk beyond purely physical exposures.
Question 2: How does 'work pace control' function as a psychosocial ergonomic factor in manufacturing environments?
- Workers who set their own pace always produce less output
- Machine-paced work removes a worker's ability to vary pace, rest micro-muscles, or adjust technique, increasing cumulative load (Correct answer)
- Work pace control refers only to break scheduling by supervisors
- Paced work reduces MSDs by ensuring consistent motion patterns
Correct answer: Machine-paced work removes a worker's ability to vary pace, rest micro-muscles, or adjust technique, increasing cumulative load
When machines or conveyor systems dictate work pace, workers lose the ability to take brief micro-pauses or vary their technique, leading to higher cumulative physical and psychological strain.
Question 3: In the context of organizational ergonomics, what does 'job enlargement' refer to?
- Increasing the number of hours in a shift
- Adding more tasks of similar complexity to a job to reduce repetition and exposure to a single set of movements (Correct answer)
- Promoting a worker to a supervisory role
- Expanding the physical footprint of a workstation
Correct answer: Adding more tasks of similar complexity to a job to reduce repetition and exposure to a single set of movements
Job enlargement increases task variety by adding horizontally similar tasks, which distributes physical exposure across more muscle groups and reduces repetitive strain on any single body region.
Question 4: What is the relationship between 'social support at work' and musculoskeletal disorder outcomes?
- Social support has no documented relationship to physical injury risk
- Higher supervisor and coworker social support is associated with lower MSD rates and faster recovery from injuries (Correct answer)
- Social support only affects psychological disorders, not physical MSDs
- Social support reduces MSD reporting but does not affect actual injury incidence
Correct answer: Higher supervisor and coworker social support is associated with lower MSD rates and faster recovery from injuries
Research consistently shows that strong social support from supervisors and peers is associated with reduced MSD incidence, lower pain severity, and faster return-to-work outcomes.
Question 5: Which organizational strategy is most effective at reducing ergonomic risk at the system level rather than the individual level?
- Providing ergonomic awareness pamphlets to individual employees
- Implementing job rotation without ergonomic analysis of rotation partners
- Establishing a joint labor-management ergonomics committee with authority to drive workstation changes (Correct answer)
- Requiring workers to self-report discomfort using anonymous suggestion boxes
Correct answer: Establishing a joint labor-management ergonomics committee with authority to drive workstation changes
A joint labor-management ergonomics committee with actual decision-making authority creates systemic, sustained ergonomic improvement by addressing root causes in the work system rather than relying on individual behavior change.
Question 6: How does 'shift work and irregular schedules' contribute to ergonomic risk in industrial settings?
- Night shift workers are assigned heavier tasks by regulation
- Disrupted circadian rhythms reduce alertness, slow reaction time, and impair the neuromuscular coordination that helps workers avoid awkward postures and overexertion (Correct answer)
- Shift workers have stronger muscles due to irregular sleep-rest cycles
- Irregular schedules only affect psychological health, not physical MSD risk
Correct answer: Disrupted circadian rhythms reduce alertness, slow reaction time, and impair the neuromuscular coordination that helps workers avoid awkward postures and overexertion
Circadian disruption from shift work degrades cognitive function, alertness, and neuromuscular performance, increasing the likelihood of postural errors, overexertion events, and delayed recovery from cumulative loading.
CIEE CIEE Psychosocial & Organizational Ergonomics 1
Which psychosocial work factor is most consistently linked to increased risk of musculoskeletal disorders (MSDs) in occupational research?