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Human Factors in Construction Safety: Why Workers Ignore Hazards and What Actually Works

     时间: 2025-12-05

Why do workers take risks they clearly recognize?

Because human instincts, pressure, and culture often override what people know.

Unsafe behavior isn’t personal — it’s psychological.

Understanding that is the first step to reducing it.

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1. The Risk Familiarity Effect

When a hazard has been present for a long time without causing an accident, the brain gradually lowers its guard.

Examples:

  • Repeatedly stepping over guardrails

  • Getting used to doing “quick tasks” at edges

  • Climbing on parts of scaffolding not meant for climbing

  • Walking on loose scaffold planks

At first, workers are cautious. But after many times with “nothing happening,” the brain starts forming a false belief:

“It was fine before. It’ll be fine this time too.”

This is the Risk Familiarity Effect, and experienced workers can sometimes become more complacent than new ones.


2. Overconfidence From Safety Measures

The psychology concept known as risk compensation suggests:

When people feel protected, they subconsciously lower their vigilance.

Examples:

  • Wearing a harness → stepping closer to edges

  • Having a lanyard → not checking whether the anchor point is secure

  • Guardrails installed → leaning on them while working

Important clarification:

Protection equipment reduces consequences, not the risk itself.

Without proper habits and supervision, even excellent protective gear may distort workers’ perception of danger.


3. Time Pressure

Tight deadlines and rushed schedules are among the strongest drivers of unsafe behavior.

1) Tunnel vision

Under pressure, workers focus solely on “getting the job done” and may overlook:

  • Edge distance

  • Ground conditions

  • Scaffolding stability

  • Changes in surrounding hazards

2) Automatically choosing the “fastest” method

Examples:

  • Stepping over barriers to save a few seconds

  • Not clipping in “just for a quick task”

  • Avoiding designated safe routes

  • Cutting through hazardous areas to take shortcuts

This is the brain’s automatic “optimization” mode—but it’s dangerously flawed.


4. Team Culture

Workers copy the behavior of their peers far faster than they adopt written rules.

What influences them?

  • How veteran workers do things

  • The supervisor’s attitude

  • The team’s default working habits

  • Whether risky shortcuts are silently tolerated

If the site culture implicitly communicates:

  • “Everyone does it this way.”

  • “Speed matters more than safety.”

  • “Harnesses are a hassle—no need to use them.”

New workers will inevitably be shaped by that culture.
This is an environmental driver, not a personal choice.


5. Selective Attention

Human attention is limited.

During repetitive or complex tasks, the brain prioritizes the core action and filters out “unimportant” surroundings. This leads to common incidents such as:

  • Carrying materials and overlooking an open hole

  • Focusing on a tool and not noticing proximity to an edge

  • Getting distracted by a radio call and stepping into danger

It’s not “carelessness”—it’s attention overload.


6. How to Reduce Risk-Taking Behavior

1) Prioritize engineering controls

Engineering controls are far more effective than slogans or training because they eliminate opportunities for unsafe actions.

For example:

  • Installing fixed guardrails

  • Adding horizontal or vertical lifelines

  • Providing accessible anchor points

  • Creating clear safe walkways

  • Designing structures to discourage climbing or crossing

2) Build a positive safety culture

  • Senior workers must model correct behavior

  • Supervisors must reinforce safety first

  • Reward safe actions instead of tolerating shortcuts

  • Establish zero tolerance for unsafe practices

3) Manage schedules realistically

Research consistently shows: time pressure strongly correlates with unsafe behavior.

Improve this by:

  • Adjusting schedules

  • Adding buffer time for key tasks

  • Stating clearly that high-risk tasks cannot be rushed

  • Giving workers the right to stop work for safety

4) Use continuous risk reminders to counteract complacency

  • Daily safety briefings

  • Pre-task checks for working at height

  • Clear, site-specific visual reminders

  • Real-world case discussions

Workers must continually “re-see” the hazard for their brains to stay alert.


Conclusion: Risk-Taking Isn’t a Worker Problem—It’s a System Problem

Human-factors and safety psychology research consistently show that unsafe behavior arises from system design, human nature, workplace culture, and operational pressure—not from workers’ attitudes.

This means that meaningful reductions in unsafe behavior require coordinated efforts in:

  • Engineering controls

  • Management processes

  • Team leadership and modeling

  • Continuous risk reminders

Among these, engineered fall-protection solutions are the most stable and least affected by personal habits or emotions. Lifeline systems, harnesses, and restraint devices reduce exposure at the source and form the foundation of long-term safety.