What psychological health and safety is

This is an awareness-level course about psychological health and safety at work. It explains how the way work is designed, organized and managed affects mental health, and what workers, supervisors and employers can do to prevent psychological harm and support people who are struggling, with reference to occupational health and safety (OHS) law, human rights law and the National Standard of Canada for Psychological Health and Safety in the Workplace. If you or someone you are with is in immediate danger, call 911 or your local emergency number. If you are thinking about suicide or are worried about someone, you can call or text 9-8-8, the Suicide Crisis Helpline, at any time, anywhere in Canada.

For most of the history of occupational safety, the word hazard brought to mind things that could crush, cut, burn or poison a worker: unguarded machines, falls from height, toxic chemicals, noise. Those hazards still injure and kill people, and earlier courses in this program deal with them. But over the past few decades employers, regulators and researchers have recognized that work can also harm people's minds. Chronic overload, constant conflict, bullying, fear of job loss, traumatic events, long and irregular hours and a sense of having no control can all lead to stress, anxiety, depression, burnout and other psychological injuries. These injuries are as real as a broken arm. They cause suffering, keep people off work, end careers and, in the worst cases, contribute to deaths.

Psychological health and safety is the part of occupational health and safety that deals with these risks. It asks the same questions safety professionals ask about any hazard: what could cause harm, who could be harmed, how likely and how serious is it, and what controls will prevent it? It also asks a second set of questions that are particular to mental health: how can work support good mental health, and how should a workplace respond when someone is unwell? This first lesson builds the foundations: key terms, the difference between mental health and mental illness, the idea of a continuum, and the three goals of a psychologically healthy and safe workplace.

Mental health, mental illness and psychological injury

The World Health Organization describes mental health as a state of mental well-being that enables people to cope with the stresses of life, realize their abilities, learn well and work well, and contribute to their community. Mental health is not simply the absence of a mental illness. A person can be living with a diagnosed condition, such as depression or bipolar disorder, and still have good mental health on most days because the condition is well managed and their life and work support them. Another person can have no diagnosis at all and still be struggling badly because of grief, conflict or exhaustion.

A mental illness, or mental disorder, is a clinically significant pattern of changes in thinking, mood or behaviour that causes distress or interferes with daily functioning, diagnosed by a qualified professional using recognized criteria. Common examples include depressive disorders, anxiety disorders, post-traumatic stress disorder (PTSD), bipolar disorder and substance use disorders. Mental illnesses have many causes, including genetics, life experiences and physical health, and work is only one possible contributor. That point matters: this course does not suggest that every mental illness is caused by work, and it does not ask supervisors to diagnose anyone.

Psychological injury, or psychological harm, is the term safety law and workers' compensation systems often use for harm to mental health that arises out of work. It includes conditions such as PTSD after a traumatic event, an adjustment disorder after prolonged harassment, or depression linked to chronic, excessive workplace stressors. Workers' compensation boards in both countries now accept some of these claims, although the rules differ widely, as Lesson 4 explains.

The mental health continuum

Mental health is not a switch with two settings. It changes over time and moves along a continuum. A widely used way to picture this is the mental health continuum model, which originated in the Canadian Armed Forces and is used in programs such as The Working Mind from the Mental Health Commission of Canada. It describes four zones, often coloured from green to red:

• Healthy: normal fluctuations in mood, sleeping well, physically active, performing well, socially connected.
• Reacting: nervous or irritable, trouble sleeping, low energy, procrastinating, pulling back from others. Most people pass through this zone regularly in response to ordinary stress.
• Injured: anxious, angry or sad most of the time, restless or disturbed sleep, fatigue, reduced performance, more frequent use of alcohol or other substances to cope.
• Ill: excessive anxiety, depressed mood, unable to sleep or sleeping too much, unable to perform duties, withdrawal, possible thoughts of suicide. This zone usually needs professional care.

The model has three practical uses. First, it normalizes ordinary reactions to stress: everyone moves into the reacting zone sometimes, and that is not a sign of weakness or illness. Second, it shows that early recognition matters. A person in the reacting or injured zone can often move back to healthy with rest, support and changes to their work, whereas someone who reaches the ill zone usually needs more time and professional help. Third, it gives workers and supervisors a shared, non-clinical language. Saying "I think I'm in the orange zone this month" is easier for many people than naming a diagnosis.

What a psychologically healthy and safe workplace is

The National Standard of Canada for Psychological Health and Safety in the Workplace, CAN/CSA-Z1003-13/BNQ 9700-803/2013, released in 2013 and reaffirmed since, defines a psychologically healthy and safe workplace as one that promotes workers' psychological well-being and actively works to prevent harm to worker psychological health, including in negligent, reckless or intentional ways. The standard is voluntary, but it is widely used across Canada as a framework, and the Mental Health Commission of Canada (MHCC) champions it. A revised edition is being developed, with publication expected around the end of 2026, so check whether a newer edition is in force when you read this.

Across these frameworks, a psychologically healthy and safe workplace does three things:

• Prevent harm. It identifies psychosocial hazards, such as excessive workload, poor role clarity, lack of support or exposure to trauma, assesses the risks and controls them, just as it would with physical hazards. This is the core of psychological safety in the OHS sense.
• Promote health. It builds features of work that support good mental health: meaningful work, fair treatment, recognition, reasonable control, good relationships, opportunities to learn and grow, and leaders who care.
• Resolve incidents and concerns. It responds when things go wrong: it handles complaints fairly, supports workers after traumatic events, helps people who are struggling find help, accommodates mental health conditions and supports a safe return to work after absence.

These goals overlap. A team where people feel able to raise problems early helps prevent harm and also helps resolve incidents before they grow. A fair, well-run return to work after a mental health absence protects that worker and shows the rest of the team that it is safe to ask for help.

Two meanings of psychological safety

The phrase psychological safety is used in two different ways, and it is worth keeping them apart. In occupational health and safety, psychological safety means protection from psychological harm: the absence of psychosocial hazards that could injure mental health, in the same way physical safety means protection from physical injury. In organizational behaviour, a term made popular by Professor Amy Edmondson of Harvard Business School, team psychological safety means a shared belief that it is safe to take interpersonal risks, such as speaking up with a concern, admitting a mistake or asking a question, without being punished or humiliated. Both matter, and they reinforce each other. This course uses psychological health and safety for the broad OHS concept and team psychological safety for Edmondson's idea, which is covered in Lesson 10.

Why it matters

There are three main reasons for workplaces to take psychological health and safety seriously. The first is human: mental health problems cause real suffering for workers and their families, and work can either add to that suffering or help relieve it. The second is legal: employers have general duties to protect workers' health, which in most jurisdictions include mental health, plus specific duties on harassment, accommodation and return to work. The third is organizational: poor psychological health and safety shows up as absenteeism, presenteeism (being at work but unable to function well), turnover, conflict, errors, incidents, disability claims and damaged reputation. Lesson 3 looks at the numbers.

Many Canadians will recognize the scale from their own workplaces. The Mental Health Commission of Canada has long reported that in any given week, about 500,000 people in Canada are unable to work because of mental health problems or illnesses, and that roughly one in five people in Canada experiences a mental health problem or illness in a given year.

Roles and responsibilities at a glance

Psychological health and safety is a shared responsibility, but not an equal one. Employers control how work is designed and resourced, so they carry the main duty to identify and control psychosocial hazards. Supervisors and managers shape the day-to-day experience of work: how tasks are assigned, how people are treated, whether concerns are heard. They need training and support to do this well. Workers contribute by following safe practices, treating colleagues with respect, reporting hazards and concerns, and looking after their own health as far as they can. Joint health and safety committees, health and safety representatives, unions, human resources, occupational health providers and EAPs all have parts to play. Later lessons explain each role in more detail.

One caution is important. Psychological health and safety is not mainly about teaching individuals to be more resilient so they can cope with bad work. Resilience training, mindfulness apps and wellness days can help some people, but on their own they treat the symptoms rather than the causes. Just as no safety professional would respond to a dangerous machine by offering workers a course in being careful, a serious psychological health and safety program starts by fixing the work itself, then adds individual supports on top.