Sources of stress in the workplace

Workplace stress is a significant issue that can affect an individual's health and well-being. Stress not only impacts personal health but also leads to increased absenteeism, affecting businesses and the broader economy.

Key factors contributing to workplace stress

• Relationships with others - Interactions with managers, colleagues, or clients can become tense, leading to feelings of being undervalued or unsupported.
• Workload and deadlines - High demands and tight schedules can create pressure, making it difficult to manage tasks effectively.
• Physical working conditions - Environments that are noisy, cramped, or have extreme temperatures can add to discomfort, alongside risks from health hazards or irregular hours.
• Role-related concerns - Uncertainty about job security, limited career progression, unclear responsibilities, or conflicting demands from different parties can heighten anxiety.
• Lack of autonomy - Limited influence over the nature or volume of work, as well as when or where tasks are completed, can contribute significantly to stress levels.

The impact of lack of control on workplace stress

A major contributor to workplace stress is the feeling of having little control over one's work. Research has demonstrated a clear link between perceived lack of control and increased stress, which can manifest in serious health issues.

Marmot et al. (1997) study on workplace control and illness

• Method - A survey was conducted with over 7000 civil service workers in London, gathering data on employment grade, perceived control, social support, and other factors.
• Results - Follow-up medical records after five years revealed that employees in lower-grade positions, who reported less control and social support, had a higher incidence of cardiovascular issues. Those in the lowest grade were approximately four times more likely to suffer a fatal heart attack compared to the highest grade.
• Conclusions - Perceived lack of control in the workplace significantly contributes to stress and related health problems.
• Evaluation - The study focused solely on office-based roles, so findings may not extend to other job types. Lifestyle factors such as smoking, diet, or physical activity, often linked to job grade, could also contribute to illness rather than stress alone.

Frankenhaeuser (1975) study on stress in sawmill workers

• Method - Two groups of sawmill workers were compared. One group performed repetitive, noisy tasks with little control over pace due to machine operation and minimal social interaction. The other group had more control over workload and greater social contact. Stress was assessed through urine tests for hormone levels and blood pressure readings.
• Results - Workers with less control and limited social interaction showed elevated stress hormone levels in their urine, alongside higher rates of high blood pressure and stomach ulcers.
• Conclusions - A lack of control and social isolation in the workplace are key drivers of stress.
• Evaluation - As a field experiment, the study reflects real-world conditions, enhancing its ecological validity. It aligns with Marmot's findings. However, it overlooks individual differences in stress susceptibility and potential influences like wage disparities.

Physiological measures of stress

Stress triggers physical changes in the body, which can be quantified through various physiological tests.

Methods for measuring stress physiologically

• Heart rate monitoring - A chest strap with a transmitter detects electrical activity to measure heart rate. An elevated heart rate often indicates stress.
• Blood pressure assessment - An inflatable cuff is placed on the arm to temporarily restrict blood flow. As it deflates, pulse readings determine blood pressure, with high levels associated with stress.
• Hormone level analysis - Blood or urine samples are tested for stress hormones like adrenaline and cortisol. Increased levels suggest heightened stress.
• Skin conductance response - This measures the skin's electrical resistance, influenced by sweat levels. A higher response is linked to stress due to increased moisture on the skin.

Advantages and limitations of physiological measures for assessing stress

Using physiological tests to evaluate stress offers objective data, but there are limitations to their reliability and interpretation.

Advantages of physiological measures

• Objectivity - These tests provide unbiased results, unaffected by personal or researcher influence, as they measure direct bodily responses.
• Treatment guidance - Results can inform specific interventions, such as prescribing beta-blockers to reduce an elevated heart rate caused by stress.

Limitations of physiological measures

• Ambiguity in interpretation - Changes in physiological markers may not solely reflect stress. Factors like poor diet, lack of sleep, or alcohol use, often adopted as coping mechanisms, can also cause similar changes.
• Accuracy concerns - The technology used for these measurements is not always entirely precise, which can affect the reliability of the results.