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Full-Text Articles in Medicine and Health Sciences
Surveying Collegiate Student Pilots For Their Perspectives On Their Collegiate Flight Training Experience, Nicoletta Fala, Denise K. Whitford
Surveying Collegiate Student Pilots For Their Perspectives On Their Collegiate Flight Training Experience, Nicoletta Fala, Denise K. Whitford
International Symposium on Aviation Psychology - 2021
Women make up roughly half of the population, but continue to be an underrepresented group in aviation. They constitute nearly 14% of student pilots, but only 8% of Federal Aviation Administration (FAA) pilot certificates, leading to a lack of understanding why a substantial number of women do not complete their training. Past diversity initiatives have not resulted in a sufficient increase in the numbers. This paper discusses a study in progress that is intended to gain perceptions of women’s experiences and obstacles in collegiate flight programs using a longitudinal survey of collegiate pilots. The aim of the study is to …
Decision Support Tools For The Collaborative Trajectory Options Program, Philip J. Smith, Amy Spencer, Mark Evans, Bob Hoffman, Bert Hackney, Rafal Kicinger
Decision Support Tools For The Collaborative Trajectory Options Program, Philip J. Smith, Amy Spencer, Mark Evans, Bob Hoffman, Bert Hackney, Rafal Kicinger
International Symposium on Aviation Psychology - 2021
The FAA currently makes frequent use of Flow Constrained Areas (FCAs) to thin traffic through some region of airspace by assigning departure delay to flights filed to fly through that airspace. An important potential future use of such FCAs is their integrated application within a Collaborative Trajectory Options Program (CTOP) Traffic Management Initiative (TMI). This paper reports the results of cognitive walkthroughs completed with ten recently retired traffic managers. These walkthroughs were designed to evaluate information and information display requirements, as well as other decision support requirements, for software to enable the creation of FCAs for a CTOP TMI
Airspace Complexity For Pilots Operating In High-Density Terminal Airspace: New York Case Study, Divya C. Chandra, Andrea Sparko, Andrew Kendra, Janeen Kochan
Airspace Complexity For Pilots Operating In High-Density Terminal Airspace: New York Case Study, Divya C. Chandra, Andrea Sparko, Andrew Kendra, Janeen Kochan
International Symposium on Aviation Psychology - 2021
Performance-based navigation (PBN) has been implemented in the redesign of terminal airspace across the National Airspace System (NAS). However, some locations, such as the New York metro area (NY), have not adopted PBN widely. Modernizing flight operations at high-density terminal airspace like NY is challenging, but also has the potential for significant operational benefits if successful. This research aims to understand the flight deck perspective on flying in high-density terminal airspace. We analyzed 73 events from the Aviation Safety Reporting System (ASRS) to assess flight operations at four major NY airports before COVID-19. We defined and explored the concept of …
Spatial-Temporal Cluster Approach To Discover Visual Scanning Behaviors In Virtual Reality, Ziho Kang, Jerry Crutchfield, Ricardo Palma Fraga, Saptarshi Mandal
Spatial-Temporal Cluster Approach To Discover Visual Scanning Behaviors In Virtual Reality, Ziho Kang, Jerry Crutchfield, Ricardo Palma Fraga, Saptarshi Mandal
International Symposium on Aviation Psychology - 2021
If we could discover the visual scanning patterns of expert air traffic control operators (ATCOs), we could use those findings to better train novices. One critical issue is that visual scan paths can be complex even for a short period of time, therefore, a systematic approach is required to obtain clear and meaningful visual scanning patterns. We transformed the raw eye movement data of expert ATCOs into visual scanning patterns by using the collapsed eye movement sequences that occurred on important areas of interest, then visualized them based on accumulated time frames. We collected and subsequently analyzed controller eye movements …
Measuring The Range Of Attention To Preview And Its Momentary Persistence In Simulated Driving, Tyler N. Morrison, Richard J. Jagacinski, Jordan Petrov
Measuring The Range Of Attention To Preview And Its Momentary Persistence In Simulated Driving, Tyler N. Morrison, Richard J. Jagacinski, Jordan Petrov
International Symposium on Aviation Psychology - 2021
Participants used a position control system to track the center of a simulated winding roadway with preview that ranged from 0.3 to 1.0 s. Participants’ spatial distributions of attention were measured by perturbing the roadway with different frequency sinusoids at different roadway positions and then measuring the degree to which those frequencies were present in their tracking movements. Participants exhibited a continuous range of attention, and it lengthened with the amount of displayed preview. When preview disappeared for 5 s, longer time to regress to feedback control was strongly correlated with the amount of preview that was withdrawn. During preview …
The Customer Is Always Right… Towards Rhino Pointing And Eye Tracking Interfaces For Combat Aviators, Patrick Highland, Daniel Harp, Thomas Schnell, Eric Geiselman, Paul Havig
The Customer Is Always Right… Towards Rhino Pointing And Eye Tracking Interfaces For Combat Aviators, Patrick Highland, Daniel Harp, Thomas Schnell, Eric Geiselman, Paul Havig
International Symposium on Aviation Psychology - 2021
At warfighter request, research was conducted to determine the military utility of eye tracking (ET) as a human machine interface (HMI) for large area displays (LADs) in a tactical live-flight environment. Flight test determined ET felt effortless until rapidly changing lighting conditions and pupil sizes as well as elevated gravitational load factor induced ET slippage rendered the requested interface unusable. In the spirit of, “the customer is always right,” researchers proved the warfighter ultimately wise in her request for a novel LAD HMI by testing a head tracking algorithm, called “Rhino Pointing (RP)”, alongside ET. RP was simpler to implement …
Uas Safety Zones: A Model For Addressing Increased Air Traffic Controller Workload, Pratik Jadhav, Damon Lercel, Sarah Hubbard
Uas Safety Zones: A Model For Addressing Increased Air Traffic Controller Workload, Pratik Jadhav, Damon Lercel, Sarah Hubbard
International Symposium on Aviation Psychology - 2021
This paper presents a model to address the increased workload for air traffic controllers (ATC) due to the integration of unmanned aircraft systems (UAS) into the airport ecosystem. The FAA established small UAS operational regulations in 2016. Already, UAS pilots comprise over 20% of the total pilot population, and UAS account for 89% of the total aircraft registrations. Given current FAA resource constraints and the forecast growth of air traffic, innovative safety management solutions are required to address the increase in controller workload and the associated safety risks. This research presents one perspective regarding the impact of UAS operations on …
Modeling Contingency Management In Unmanned Aircraft Systems Traffic Management, Emily Barrett, Martijn Ijtsma
Modeling Contingency Management In Unmanned Aircraft Systems Traffic Management, Emily Barrett, Martijn Ijtsma
International Symposium on Aviation Psychology - 2021
Contingency management in future Unmanned Aerial Vehicles (UAVs) Traffic Management (UTM) requires a variety of distributed and interdependent functions and services—such as flight tracking and conformance monitoring, weather detection and prediction, and ground-based detection and avoidance— that need to be coordinated across multiple roles and organizations. This paper describes a combination of cognitive walkthroughs and computational modeling of work to analyze edge case scenarios and assess resiliency in future UTM operations. We discuss how the walkthrough and modeling inform each other and present early results. The ultimate goal of this work is to identify requirements for robust and resilient system …
Human Factors Considerations For Urban Air Mobility, Bhoomin B. Chauhan, Meredith Carroll
Human Factors Considerations For Urban Air Mobility, Bhoomin B. Chauhan, Meredith Carroll
International Symposium on Aviation Psychology - 2021
Before urban air mobility (UAM) flights are safely integrated into the current airspace system, it is necessary to identify and address human factors issues associated with UAM. Various industry and academic institutions are currently exploring a range of different aspects of UAM, such as vehicle concepts, airspace integration, and ground infrastructure, all of which have human factors implications. These human factors issues, which will heavily influence how UAM operations will evolve with growth in demand and autonomous technology, are in need of research. Potential human factors issues include UAM pilot’s trust in automation, situational awareness, visual scanning, decision-making capabilities, as …
How To Teach College Aviation Students About Situation Awareness In A Virtual Classroom Setting, Andrew R. Dattel, Hui Wang, Nathaniel Booker, Andrei Matveev, Syaza R M Harris, Hanzi Xie, Zihao Zhang
How To Teach College Aviation Students About Situation Awareness In A Virtual Classroom Setting, Andrew R. Dattel, Hui Wang, Nathaniel Booker, Andrei Matveev, Syaza R M Harris, Hanzi Xie, Zihao Zhang
International Symposium on Aviation Psychology - 2021
Creating a group class project to demonstrate situation awareness (SA) can be an effective pedagogical approach. By engaging students in such projects, they can understand the meaning of SA — comprehension of relevant information in a dynamic environment (Durso et al., 2007). In an SA class taught at an aeronautical university during the past several years, students engaged in observational and interactive projects. However, COVID-19 has prohibited in-person activities. In lieu of such in-person activities, students enrolled in a virtual SA class during summer 2020 utilized online road cameras found at traffic intersections in Madrid, New York, and Tokyo. This …
Covid-19 Impacts On Collegiate Aviation Training, Xiaoyu O. Wu, Jacob J. Shila
Covid-19 Impacts On Collegiate Aviation Training, Xiaoyu O. Wu, Jacob J. Shila
International Symposium on Aviation Psychology - 2021
In 2020, the COVID-19 pandemic has had a significant impact on the aviation industry. The regular day-to-day fight training routines have been altered for several reasons, including physical distancing requirements, disrupted training schedule, and the increased level of concern. Aviation educators will likely need to adapt their programs to optimize the learning experience, maintain effective safety delivery, and ensure competent graduates. The impact of the month-long break in fight training on the airmanship skills is also unaccounted for. This study surveyed collegiate aviation students to identify the COVID-19 shut down impacts on both their fight skill developments and the over-all …
Using A Perceptual Speed Test To Predict Flight Training Performance: New Findings, Diane L. Damos, Alvah C. Bittner, Mary Niemczyk
Using A Perceptual Speed Test To Predict Flight Training Performance: New Findings, Diane L. Damos, Alvah C. Bittner, Mary Niemczyk
International Symposium on Aviation Psychology - 2021
Using a Perceptual Speed Test to Predict Flight Training Performance: New Findings
Applying Eye-Tracking Technology To Explore The Visual Scanning Practices Of Air Traffic Control Tower Controllers, Jerry Crutchfield, Ziho Kang, Ricardo Palma Fraga, Saptarshi Mandal
Applying Eye-Tracking Technology To Explore The Visual Scanning Practices Of Air Traffic Control Tower Controllers, Jerry Crutchfield, Ziho Kang, Ricardo Palma Fraga, Saptarshi Mandal
International Symposium on Aviation Psychology - 2021
In the domain of Air Traffic Control (ATC), visual scanning refers to a systematic and continuous effort to acquire all necessary information to build and maintain a complete awareness of activities and situations which may affect the controllers’ area of responsibility. Our research team has supported FAA efforts to improve training of the important scanning skill, by conducting research to identify characteristics of successful tower visual scanning behavior. In addition to conducting multidisciplinary working groups and structured one-on-one interviews, we have collected eye-movement data from tower control experts while they controlled high fidelity air traffic simulations of airports at which …
Measuring Motivation In Pilot Training Applicants, John D. Trent, Mark R. Rose
Measuring Motivation In Pilot Training Applicants, John D. Trent, Mark R. Rose
International Symposium on Aviation Psychology - 2021
This study evaluated applicant motivation in pilot selection. Traditional measures of motivation have moderate to low predictive validity in flight training and often show large subgroup differences. The purpose of this study was to evaluate a self-report measure of motivation by examining 1) dimensionality, 2) reliability, 3) predictive validity, 4) construct validity, 5) validity based on known groups, and
Validating Stress Tolerance Exercise With Game-Based Assessment And Stress Checklists, Jóhann Wium
Validating Stress Tolerance Exercise With Game-Based Assessment And Stress Checklists, Jóhann Wium
International Symposium on Aviation Psychology - 2021
Stress tolerance is an important attribute for air traffic controllers. Assessing an individual’s stress tolerance should therefore be considered when selecting student air traffic controllers. Unfortunately, measures of stress tolerance are often self-reports and as such are subject to “faking good”. This paper details the validation of an observation-based stress tolerance exercise and its convergent validity with behavioral signs of stress (from stress checklists) and results of game-based assessments of Emotional Stability and Performance Under Pressure. The resulting data suggests that ratings from the exercise are valid and that game-based assessments can be used to predict ratings made from observable …
Applying Human Factors Heuristic Evaluation Tools To Improve Aviation Weather Displays: A Mismatch, John Kleber, Paige Lawton, Beth Blickensderfer
Applying Human Factors Heuristic Evaluation Tools To Improve Aviation Weather Displays: A Mismatch, John Kleber, Paige Lawton, Beth Blickensderfer
International Symposium on Aviation Psychology - 2021
Background. Weather-related accidents have one of the highest fatality rates among General Aviation (GA) accidents. Pilots obtain graphical and textual weather information from aviation weather displays during both preflight planning and while inflight. Interpretation scores of weather products remain low regardless of pilot certification/rating. Previous research identifies poor usability as one cause of weather displays' low interpretability. Given the frequency of updates to weather displays, a rapid usability assessment technique is needed. Heuristic evaluations are a common method for quickly identifying usability problems. Heuristics evaluations entail expert reviewers evaluating an interface using a validated set of heuristic guidelines. This paper …
An Analysis Of Information Requirements For Passengers Of (Autonomous) Urban Air Mobility Vehicles, Dennis B. Beringer
An Analysis Of Information Requirements For Passengers Of (Autonomous) Urban Air Mobility Vehicles, Dennis B. Beringer
International Symposium on Aviation Psychology - 2021
Much effort has been put into examining control/monitoring strategies for semiautonomous/autonomous urban air mobility vehicles (UAMVs). Less has been done to define information requirements for passengers to facilitate their cognitive comfort. Similarities and differences between driverless automobiles (and transport-category aircraft) and UAMVs will both affect what information is needed and what operational factors influence that need, including; perceived locus of control, shared fate, ambient visibility, familiarity with the area to be traversed, and operational status of the vehicle. Information impacted includes route/progress (location, estimated time of arrival), phase of flight, and system status as well as communications between passenger and …
Resilience Engineering’S Potential For Advanced Air Mobility (Aam), Christopher Nemeth, Jon Holbrook
Resilience Engineering’S Potential For Advanced Air Mobility (Aam), Christopher Nemeth, Jon Holbrook
International Symposium on Aviation Psychology - 2021
The national airspace (NAS) will rapidly evolve in the next ten to twenty years. Plans for Advanced Air Mobility (AAM) during that period envision highly automated airspace management systems and electrically powered vehicles. AAM concepts also anticipate limited human roles. The goal of limiting the human role is to minimize the potential for misadventures, yet how the human role is limited needs to be carefully considered in order to also preserve the potential for human successes. The field of resilience engineering (RE) focuses on how systems can change in order to seize an opportunity or withstand an unforeseen challenge. RE …
Reports Of Resilient Performance: Investigating Operators’ Descriptions Of Safety-Producing Behaviors In The Aviation Safety Reporting System, Jolene Feldman, Immanuel Barshi, Brian Smith, Bryan Matthews
Reports Of Resilient Performance: Investigating Operators’ Descriptions Of Safety-Producing Behaviors In The Aviation Safety Reporting System, Jolene Feldman, Immanuel Barshi, Brian Smith, Bryan Matthews
International Symposium on Aviation Psychology - 2021
While many existing taxonomies and frameworks provide a common vocabulary for describing how human operators fail in the context of sociotechnical systems, at present, there is no common vocabulary to describe how humans succeed. Such a framework would facilitate systematically collecting and analyzing data on how human performance can produce safety, not just how it can reduce safety. One potentially rich source of currently available information for exploring desired performance is the reports submitted to NASA’s Aviation Safety Reporting System (ASRS). These de-identified, confidential, and voluntary narrative reports are submitted by pilots, controllers, ground operators, and others within aviation operations. …
Display Design To Avoid And Mitigate Limit Cycle Oscillations On The F-16c, David Feibus
Display Design To Avoid And Mitigate Limit Cycle Oscillations On The F-16c, David Feibus
International Symposium on Aviation Psychology - 2021
The U.S. Air Force F-16C’s flight envelope is defined by its external weapon stores configuration, and the employment of some munitions at certain speeds can cause the F-16 to enter a flutter-like state called Limit Cycle Oscillations (LCO). In LCO, the pilot experiences turbulent vibrations reducing their fine motor control. The current research attempted to help pilots anticipate an LCO-susceptible configuration by projecting the consequences of employing certain munitions. It was hypothesized that the new displays would result in fewer flight envelope violations, fewer LCO occurrences, and increased situation awareness. The results show that there are situation awareness benefits if …
Observing On-Demand Aircrew Transitioning From Paper To Electronic, Charla L. Long, Kevin M. Gildea
Observing On-Demand Aircrew Transitioning From Paper To Electronic, Charla L. Long, Kevin M. Gildea
International Symposium on Aviation Psychology - 2021
The introduction of electronic flight bags (EFBs) for flight crew use has reduced the overall workload, except in some situations if not designed properly or employed effectively. Researchers from the Civil Aerospace Medical Institute (CAMI) undertook an observational study combined with crew interviews to assess overall flight crew operations including flight demands, procedures, and the methods the crews used to integrate EFBs into all aspects of their flights from preflight planning to postflight debrief. The researchers also examined the EFB applications (apps) themselves for general usability and developed some recommendations for ways EFB use in operations could be improved. General …
Thinking Outside The Box: The Human Role In Increasingly Automated Aviation Systems, Joel Lachter, Alan Hobbs, Jon Holbrook
Thinking Outside The Box: The Human Role In Increasingly Automated Aviation Systems, Joel Lachter, Alan Hobbs, Jon Holbrook
International Symposium on Aviation Psychology - 2021
Rapid advances in automation are enabling transport systems to operate in an increasingly autonomous manner. From time to time, these systems encounter operational conditions that fall outside a “competency box” of scenarios and environments for which the system was designed. Human operators add resilience because they can see and act outside the automation’s competency box. Advanced aviation concepts envision fleets of highly automated air vehicles providing on-demand transport for people and goods. We examine one such concept, Urban Air Moblity [sic] (UAM) and explore how humans can best be incorporated to maintain resilience. A human-autonomy teaming approach is suggested.
Evaluating The Use Of High-Fidelity Simulator Research Methods To Study Airline Flight Crew Resilience, Chad L. Stephens, Lawrence J. Prinzel, Daniel Kiggins, Kathryn Ballard, Jon Holbrook
Evaluating The Use Of High-Fidelity Simulator Research Methods To Study Airline Flight Crew Resilience, Chad L. Stephens, Lawrence J. Prinzel, Daniel Kiggins, Kathryn Ballard, Jon Holbrook
International Symposium on Aviation Psychology - 2021
As it evolves, aviation will continue to require integration of a wide range of safety systems and practices, some of which are already in place and others that are yet to be developed. New concepts in system safety thinking have emerged to consider not only what may go wrong, but also what can be learned when things go right during commercial flight operations. Taken together, these complementary perspectives form a more comprehensive approach to system safety thinking that can help to recognize and preserve the resilient performance capabilities currently provided by humans. A need exists, however, for research methods to …
How Do Different Knowledge Frameworks Help Us Learn From Aviation Line Observations?, Randall J. Mumaw, Dorrit Billman, Jon Holbrook
How Do Different Knowledge Frameworks Help Us Learn From Aviation Line Observations?, Randall J. Mumaw, Dorrit Billman, Jon Holbrook
International Symposium on Aviation Psychology - 2021
Human performance includes actions that increase safety, as well as actions that can reduce safety. Ensuring safety in complex dynamic operations like commercial aviation depends on the ability to institute appropriate responses based on what is learned from flightcrew performance and the contexts in which it occurs. To do this systemically at the organization level requires collecting data on flightcrew performance, developing effective approaches to analyzing those data, and understanding how to translate what has been learned into policies, procedures, and practice. Systematic observation of front-line operators is a vital source of human performance data. Much has been learned from …
Systematic Review Of Weather Observation And Forecast Resources Available To General Aviation Pilots, J W. Wallace, Nicoletta Fala
Systematic Review Of Weather Observation And Forecast Resources Available To General Aviation Pilots, J W. Wallace, Nicoletta Fala
International Symposium on Aviation Psychology - 2021
Weather continues to be a consistent hazard for pilots despite decades of progress in both pilot education and weather observation and forecasting technology. Much research has been done on the various facets of this problem, from pilot psychology to the weather information sources themselves. Weather-Intelligent Navigation Data and Models for Aviation Planning (WINDMAP) is a NASA University Leadership Initiative (ULI) that aims to use Unmanned Aerial Systems (UAS) to improve the accessibility and accuracy of weather information for General Aviation (GA) pilots and UAS operators. This paper aims to produce a systematic review of research on the topic using the …
Safety Programs, Safety Management Systems And Implications For Human Performance, Julia Pounds, Paul Krois
Safety Programs, Safety Management Systems And Implications For Human Performance, Julia Pounds, Paul Krois
International Symposium on Aviation Psychology - 2021
A State Safety Program (SSP) and a Safety Management System (SMS) are both part of the Standards and Recommended Practices (SARPs) promoted by the International Civil Aviation Organization (ICAO) to support international safety in air navigation, flight inspections, air accident investigations, training, certification, and related areas. This paper discusses roles and responsibilities of the regulator and service provider focusing on human performance in oversight versus operations. Clarification is intended to help both regulators and operators focus on executing their separate and distinct roles and responsibilities for oversight versus operations. Left unaddressed, role confusion between the organizations can result in safety …
A Salute To Robert Key Dismukes: A Mentor For Translational Research In Human Factors, Janeen Adrion Kochan
A Salute To Robert Key Dismukes: A Mentor For Translational Research In Human Factors, Janeen Adrion Kochan
International Symposium on Aviation Psychology - 2021
As the fields of study associated with human factors (aviation psychology, cognitive systems engineering, engineering psychology, etc.) become broader in scope, the drive to bring the findings from academic research to those who can benefit from study findings must also expand. This paper honors Robert Key Dismukes, Ph.D., through a case study that illustrates how the bridge from research to practice (and back to research) can be built and how human factors professionals can translate and share what they know with new scientists, target populations, and the public at large. This review of Dr. Dismukes’ work demonstrates how the findings …
Flight Allocation In Shared Human-Automation En-Route Air Traffic Control, G De Rooij, C Borst, M M. Van Paassen, M Mulder
Flight Allocation In Shared Human-Automation En-Route Air Traffic Control, G De Rooij, C Borst, M M. Van Paassen, M Mulder
International Symposium on Aviation Psychology - 2021
Allocation is a challenge for higher levels of automation in air traffic control, where fights can be dynamically assigned to either a human or an automated agent. Through an exploratory experiment with six professional air traffic controllers, insight was gained into the possibilities and challenges of human-automation teamwork in an en-route environment. Participants showed high levels of automation trust, but mostly ignored automation-suggested allocations, preferring a highly automated sector instead. Most fights were delegated to automation, after they were given a direct and conflict-free path. Flights handled manually were those requiring level changes or non-standard routing. Future research should focus …
Speed-Accuracy Trade-Offs And General Systems Performance Theory: Novel Application To Fitts’ Law And Beyond, Lawrence R. Disalvi, George V. Kondraske
Speed-Accuracy Trade-Offs And General Systems Performance Theory: Novel Application To Fitts’ Law And Beyond, Lawrence R. Disalvi, George V. Kondraske
International Symposium on Aviation Psychology - 2021
Speed-accuracy trade-offs have long been of interest in human performance. General Systems Performance Theory (GSPT) was motivated by human performance measurement and modeling needs. It has subsequently been applied in those and other areas. In GSPT, all system performance attributes are modeled using a resource construct. Systems are characterized by multi-dimensional performance capacity envelopes (PCEs). The systems of interest here are considered to possess limited speed and accuracy performance resources defining a two-dimensional PCE. When considering human movement, relevance to Fitts’ law was conjectured. In multiple Fitts’ paradigm tasks, we found a near-perfect correlation between Index of Performance (IP) and …
Assessing The Relationships Between Organizational Management Factors (4ps) And A Resilient Safety Culture In A Collegiate Aviation Program With A Safety Management Systems (Sms), Daniel Kwasi Adjekum
Assessing The Relationships Between Organizational Management Factors (4ps) And A Resilient Safety Culture In A Collegiate Aviation Program With A Safety Management Systems (Sms), Daniel Kwasi Adjekum
International Symposium on Aviation Psychology - 2021
Resilient safety culture is a key factor in sustaining safety management systems (SMS) in a U.S. collegiate aviation program. The relationships between four organizational management factors (Principles, Policy, Procedures, Practices) and a resilient safety culture model based on Reason’s concept was assessed using an online survey instrument. Structural Equation Model (SEM) technique were used to assess measurement models of factors underlying a resilient safety culture. All four management factors had significant predictive relationship with resilient safety culture. Practices had the weakest predictive relationship with resilient safety culture and Policy had the highest. Procedures strongly mediated path between Policies and Practices …