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Human factors psychology, also known as ergonomics, is the study of the interface between workers, their machines, and their physical environments. The primary goal of this field is to design machines and systems that better support the workers who use them. This involves researching and designing tools to align with human requirements, considering both physical and cognitive integration. Unlike other areas of I-O psychology, human factors psychology focuses on the individual worker's interaction with specific elements like machines, workstations, and information displays.

Human Factors Psychology

Types of jobs in human factors psychology and engineering include:
- Professor
- Ergonomist
- Inspector
- Product development
- Marketer 
- Research scientist
- Safety Scientist
- Project Consultant

Types of Jobs in Human Factors and Engineering

Influential figures in human factors:

- Frederick Taylor

Influential Figures in Human Factors Psychology

A large room filled with people working at computer stations, as shown in Photograph B, illustrates a typical environment studied by human factors psychology. This field, also known as ergonomics, examines how to design these workstations—including desks, chairs, and computers—to optimize worker productivity, health, and safety.

Example of a Human Factors Psychology Environment

To promote health and safety, an ergonomic computer workstation should adhere to specific guidelines. The monitor should be positioned 19–24 inches from the user's eyes, with the top of the screen at eye level. The chair should feature an adjustable height and provide lumbar support for the lower back. Proper posture involves maintaining 90-degree angles at the elbows, hips (between the torso and thighs), and knees. Wrists should be kept straight while typing. For shorter individuals, a footrest can help maintain correct posture if their feet do not rest flat on the floor.

Ergonomic Guidelines for Computer Workstations

Beyond the traditional desk and chair setup, alternative workstation designs aim to incorporate more physical activity or varied postures into the workday. Examples of these include using an exercise ball instead of a standard chair, working at a standing desk, or utilizing a desk integrated with a stationary bicycle.

Alternative Workstation Designs

Human factors psychology plays a critical role in optimizing the work environment by focusing on three primary goals: ensuring employee safety, enhancing productivity, and improving overall job satisfaction.

Role of Human Factors Psychology in the Workplace

The human-machine interface is the point of interaction and communication between a person and a machine. As the central focus of human factors psychology, its design aims to fit machines to human requirements. This integration can be physical, cognitive, or a combination of both.

Human-Machine Interface

Human factors psychology is distinguished from other areas of industrial-organizational psychology by its specific focus. While other branches analyze the interface between a worker and their team, group, or organization, human factors psychology concentrates on the individual worker's direct interaction with machines, workstations, information displays, and environmental elements like lighting.

Comparison of Human Factors Psychology with other I-O Psychology Areas

In the United States, the field of human factors psychology emerged from the intersection of two distinct disciplines: psychology and engineering. This dual heritage is evident in the work of its early pioneers.

Origins of Human Factors Psychology

Human factors psychologists play a crucial role throughout the lifecycle of work tool development. They may be involved from the initial design stages of tools like software, displays, or machines, or they may contribute during the testing phase of an already developed product. Beyond direct involvement in product development, these professionals also contribute to establishing best practice recommendations and official regulations for design.

Roles of Human Factors Professionals in Design and Regulation

A significant focus of human factors psychology is the enhancement of workplace safety. The field's principles are applied to study and prevent work-related injuries, thereby protecting not only individual employees but also those in their immediate vicinity.

Workplace Safety as a Core Concern of Human Factors Psychology

The safety principles of human factors psychology are not limited to traditional workplaces; they also extend to activities with the potential to significantly impact the public. Consequently, safety protocols derived from this field are crucial in sectors such as commercial driving, aviation, medicine, and law enforcement.

Public Safety Applications of Human Factors Psychology

A checklist is a key method for reducing accidents and enhancing safety in the workplace. It involves a structured list of items or procedural steps that must be verified or followed to ensure tasks are completed correctly and consistently.

Checklists as a Workplace Safety Method

A 2012 study by Bruno & Abrahão provides an example of human factors research, examining how decision volume impacts the accuracy of information security operators. The study, which analyzed 45,000 decisions at a Brazilian bank, found that increased cognitive load from making more daily decisions led to a higher rate of "false positive" errors, where operators mistakenly identified safe events as security threats.

Research on Cognitive Load and Decision Accuracy in Security Operations

Research in human factors psychology is centered on understanding and enhancing the interactions between technology systems and their human operators. A significant portion of this research is dedicated to the field of human-software interactions, reflecting the increasing role of software in modern work environments.

Key Research Areas in Human Factors Psychology

A company that operates a large call center notices a significant increase in employee complaints about back pain and a simultaneous rise in data entry errors. Based on the psychological field concerned with the interface between workers, their machines, and their physical environments, which of the following solutions would be the most appropriate first step to address both issues?

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