Human Factors Psychology Commons^™

The Effects Of Security Framing, Time Pressure, And Brand Familiarity On Risky Mobile Application Downloads, Cody Parker

Psychology Theses & Dissertations

The current study examined the effects of security system framing, time pressure, and brand familiarity on mobile application download behaviors, with an emphasis on risk taking. According to the Prospect Theory, people tend to engage in irrational decision making, and make qualitatively different decisions when information is framed in terms of gains and losses (i.e., the framing effect). Past research has used this framing effect to guide the design of a risk display for mobile applications (apps), with the purpose of communicating the potential risks and minimizing insecure app selections. Time pressure has been shown to influence the framing effect …

Exploring The Effects Of Task Priority On Attention Allocation And Trust Towards Imperfect Automation: A Flight Simulator Study, Tetsuya Sato

Psychology Theses & Dissertations

The present study examined the effect of task priority and task load on attention allocation and automation trust in a multitasking flight simulator platform. Previous research demonstrated that, participants made less fixations and reported lower levels of trust towards the automation in the secondary monitoring under higher load on the primary tracking task (e.g., Karpinsky et al., 2018). The results suggested that participants perceived behaviors of the automated system less accurately due to less attention allocated to monitoring of the system, leading to decreased trust towards it. One potential explanation of the effect is that participants might have prioritized the …

Human Error In Commercial Fishing Vessel Accidents: An Investigation Using The Human Factors Analysis And Classification System, Peter J. Zohorsky

Engineering Management & Systems Engineering Theses & Dissertations

The commercial fishing industry is frequently described as one of the most hazardous occupations in the United States. The objective, to maximize the catch, is routinely challenged by a variety of elements due to the environment, the vessel, the crew, and several external considerations and how they interact with each other. The analysis of fishing vessel accidents can be complicated due to the diverse nature of the industry, including the species caught, the type and size of boat that is employed, how far travelled from their homeport, and the adequacy of the support organizations ensuring safe and uninterrupted operations. This …

The Effects Of Interruption Relevance And Complexity On Primary Task Resumption And Mental Demand, Brandon Allan Fluegel

Psychology Theses & Dissertations

In the present study, undergraduate students viewed patient charts and entered numerical values from these charts into a medical record database. They were unexpectedly interrupted by secondary tasks that differed in relevance and complexity. The secondary tasks varied by whether they facilitated or inhibited (i.e., relevant or irrelevant) rehearsal of the suspended task and whether they placed a demand on working memory (i.e., high complexity or low complexity). The primary measures of interest were the duration of time needed to resume the primary task and perceived mental demand. The Memory for Goals model (Altmann & Trafton, 2002) predicts that task …

Examining The Effect Of Interruptions At Different Breakpoints And Frequencies Within A Task, Sarah Anastazia Powers

Psychology Theses & Dissertations

Research on the effects of interruptions shows that they can be either costly or beneficial depending on which aspects of an interruption are manipulated. One important aspect that contributes to these conflicting results concerns when an interruption occurs. The present study explored how event segmentation theory (EST) can be used to determine optimal moments for an interruption relying on hierarchical task analysis (HTA) to identify coarse and fine event boundaries. Utilizing a 2 X 3 mixed design, undergraduate students completed a trip planning task divided into three task trials. The within-subjects factor was interruption timing, which had three levels: none, …

Medical Students' Experiences And Outcomes Using A Virtual Human Simulation To Improve Communication Skills: Mixed Methods Study, Timothy Guetterman, Rae Sakakibara, Srikar Baireddy, Frederick W. Kron, Mark W. Scerbo, James F. Cleary, Michael D. Fetters

Psychology Faculty Publications

Background: Attending to the wide range of communication behaviors that convey empathy is an important but often underemphasized concept to reduce errors in care, improve patient satisfaction, and improve cancer patient outcomes. A virtual human (VH)–based simulation, MPathic-VR, was developed to train health care providers in empathic communication with patients and in interprofessional settings and evaluated through a randomized controlled trial.

Objective: This mixed methods study aimed to investigate the differential effects of a VH-based simulation developed to train health care providers in empathic patient-provider and interprofessional communication.

Methods: We employed a mixed methods intervention design, involving a comparison of …

The Effect Of Task Interruptions And Reliable Cues On Detection Changes Within Dynamic Scenes, Kimberly N. Perry

Psychology Theses & Dissertations

Interruptions are a common problem for attention and pose a threat to visual task performance. The Memory for Goals (MFG) theory suggests that strongly and accurately encoded cues can assist the ability to resume a primary task after an interruption (Altmann & Trafton, 2002). Encoded cues can undergo an activation decay during an interruption and become forgotten. Currently, there has been limited research on how visual interruptions affect cued recall within a dynamic environment. Thus, the goal of the present study was to examine the effect of cuing and task interruptions on change detection within dynamic scenes. Undergraduate students watched …

The Effect Of Differing Degrees Of Automation And Reliability On Simulated Luggage Screening Performance, Molly M. Liechty

Psychology Theses & Dissertations

The present work examined the effects of two types of decision support systems in a simulated luggage screening task: An input aid and an output aid. An input aid supports an operator’s information gathering. An output aid supports decision making and action selection. A Time-Accuracy Function (TAF) analysis was applied to isolate processing time from performance asymptote, which conventional performance measures such as sensitivity and response time do not distinguish one from the other. Sixty participants performed a luggage screening task unaided (manual condition), with the assistance of an input aid (spatial aid), and with the assistance of an output …

The Effects Of Vehicle Automation Level And Warning Type On Responses To Vehicle Hacking, Wyatt D. Mcmanus

Psychology Theses & Dissertations

Modern surface transportation vehicles often include different levels of automation. Higher automation levels have the potential to impact surface transportation in unforeseen ways. For example, connected vehicles with higher levels of automation are at a higher risk for hacking attempts, because automated driving assistance systems often rely on on board sensors and internet connectivity. As the automation level of vehicle control rises, it is necessary to examine the effect of different levels of automation have on the driver-vehicle interactions. In addition, auditory warnings have been shown to effectively attract a driver’s attention while performing a driving task, which is often …

The Effects Of Automation Transparency And Reliability On Task Shedding And Operator Trust, William Everett Lehman

Psychology Theses & Dissertations

Because automation use is common in many domains, understanding how to design it to optimize human-automation system performance is vital. Well-calibrated trust ensures good performance when using imperfect automation. Two factors that may jointly affect trust calibration are automation transparency and perceived reliability. Transparency information that explains automated processes and analyses to the operator may help the operator choose appropriate times to shed task control to automation. Because operator trust is positively correlated with automation use, behaviors such as task shedding to automation can indicate the presence of trust. This study used a 2 (reliability; between) × 3 (transparency; within) …

Effects Of Focal On Driver Calibration Of Attention Maintenance Performance Using Normalized Difference And Brier Scores, James Richard Unverricht

Psychology Theses & Dissertations

Young drivers are specifically poor at maintaining attention to the forward roadway while driving. Additionally, drivers are poorly calibrated to their own abilities, often overestimating their driving skills. The current research examines the effect of FOCAL on a young driver’s calibration using two different measures, normalized difference scores and the Brier score. Thirty-six participants received either FOCAL or Placebo training program, immediately followed by driving simulator evaluation of their attention maintenance performance. In the evaluation drive, participants had driven through four scenarios in a driving simulator with their eyes tracked. Participants were asked to perform a mock visual search task …

Effects Of Control Device And Task Complexity On Performance And Task Shedding During A Robotic Arm Task, Shelby K. Long

Psychology Theses & Dissertations

The use of robotic arms across domains is increasing, but the relationship between control features and performance is not fully understood. The goal of this research was to investigate the difference in task performance when using two different control devices at high and low task complexities when participants can shed tasks to automation. In this experiment, 40 undergraduates (24 females) used two control devices, a Leap Motion controller and an Xbox controller, to teleoperate a robotic arm in a high or low complexity peg placement task. Simultaneously, participants were tasked with scanning images for tanks. During the experiment, participants had …

Identifying The Strengths And Weaknesses Of Over-The-Shoulder Attack Resistant Prototypical Graphical Authentication Schemes, Ashley Allison Cain

Psychology Theses & Dissertations

Authentication verifies users’ identities to protect against costly attacks. Graphical authentication schemes utilize pictures as passcodes rather than strings of characters. Pictures have been found to be more memorable than the strings of characters used in alphanumeric passwords. However, graphical passcodes have been criticized for being susceptible to Over-the-Shoulder Attacks (OSA). To overcome this concern, many graphical schemes have been designed to be resistant to OSA. Security to this type of attack is accomplished by grouping targets among distractors, translating the selection of targets elsewhere, disguising targets, and using gaze-based input.

Prototypical examples of graphical schemes that use these strategies …

History And Current Status Of Human Readiness Levels, Judi E. See, Holly Handley

Engineering Management & Systems Engineering Faculty Publications

[First slide]

• HRLs have been proposed as an analogue to TRLs to provide similar benefits.
• TRLs are routinely used throughout the DOD, DOE, Industry, and academia
• Value of TRLs is widely recognized.

Benefits of TRLs

Demonstrating high maturity for new technologies increases changes of program success.

• Use a common terminology across diverse organizations
• Promote testing and verification to asses maturity
• Gauge progress to plan future level of effort needed to achieve maturity
• Help manage schedule and cost risks
• Provide assurance that technologies will function as intended.

• HRLs are designed to complement TRLs during technology development.
• Mirror simple nine-level TRL scale …

The Influence Of Affective Valence And Task Uncertainty On Visual Threat Detection And Automation Use, Rachel R. Phillips

Psychology Theses & Dissertations

Objective: The purpose of this study was to examine the influence of affective valence on signal detection performance and automation use under different levels of uncertainty and with different levels of automation reliability. Method: In Experiment 1, participants completed an affect induction procedure designed to evoke positive, negative, or neutral affect. Participants then completed a visual Synthetic Aperture Radar (SAR) screening task where they were tasked with detecting the presence of foes among friends on the battlefield. The clarity of the SAR images was manipulated such that half of the images (100 per block) were relatively easy to distinguish (low …

Workload Transitions And Stress: Changes Over Time, Erik G. Prytz

Psychology Theses & Dissertations

Workload transitions are situations where operators are suddenly confronted with levels of workload substantially different from previously established levels. Workload transitions may affect the operators' state of stress and coping behaviors but previous research has not conclusively demonstrated the nature of those. The first goal of the current work was to investigate the discrepant findings of the previous literature. Two experiments were conducted where participants were asked to perform a digit detection task that suddenly shifted between low and high event rates (i.e., low and high workload, respectively). The first experiment used a large magnitude transition that resulted in a …

The Role Of Trust As A Mediator Between System Characteristics And Response Behaviors, Eric T. Chancey

Psychology Theses & Dissertations

There have been several theoretical frameworks that acknowledge trust as a prime mediator between system characteristics and automation reliance. Some researchers have operationally defined trust as the behavior exhibited. Other researchers have suggested that although trust may guide operator response behaviors, trust does not completely determine the behavior and advocate the use of subjective measures of trust. Recently, several studies accounting for temporal precedence failed to confirm that trust mediated the relationship between system characteristics and response behavior. The purpose of the current work was to clarify the roles that trust plays in response behavior when interacting with a signaling …

Effects Of Signal Ambiguity And Signal Location On Target Detection Under Varying Degrees Of Time Constraint, Kimberly E. Culley

Psychology Theses & Dissertations

The purpose of the current study was to investigate the effects of decision-making strategies and tendencies, time constraint, and signal characteristics on decision-making performance utilizing the fuzzy signal detection theory framework. Participants were tasked with deciding whether x-ray images of passenger luggage contained hazardous objects.

The first objective of the study was to develop a methodology for quantifying optimizing versus satisficing tendencies in decision making through direct measurement and observation.

The second objective of the study was to examine how time constraint and specific signal characteristics contribute to decision making. Interestingly, despite having more time available to conduct a comprehensive …

Inattentional Blindness In A Simulated Driving Task, Kellie D'Hanis Kennedy

Psychology Theses & Dissertations

The visual attention failure of inattentional blindness (IB) frequently occurs for visual information that is relevant and detectable, regardless of whether the unexpected event is congruent or incongruent within the task context. In the context of driving, an occurrence of IB has been associated with deadly collisions as well as significant property damage. For example, in 2008, drivers traveling the wrong way on clearly marked one-way roads caused 747 fatal traffic crashes. Many of these were directly attributable to inattentional blindness. Previous research focused on IB using secondary tasks such as billboards, signage, or bicyclists. The current study explored IB …

The Effect Of Improvisations And Observations On Standardized Patient Encounters, Subjective Workload And Stress, Elizabeth T. Newlin-Canzone

Psychology Theses & Dissertations

Standardized patients (SPs) are people trained to present a medical case for teaching and assessing medical students and they simultaneously perform several demanding tasks including portraying the patient, assessing the learner, and providing feedback. This study investigated the effect of improvisations and multiple task performance on the ability to observe another's nonverbal (NV) behaviors and rate their communication skills. Subjective reports of mental workload and stress were also obtained. The first study involved undergraduates interviewing for a job. Type of interview (rote and improvisational) and type of observation (passive and active) were manipulated within groups. Based on theories of attention …

Comics As A Cognitive Training Medium For Expert Decision Making, Amber Nalu

Psychology Theses & Dissertations

Experts such as military commanders must make decisions quickly and under deadly conditions. A variety of cognitive training media exist, from Powerpoint to virtual reality (VR) simulations; however, there are alternative media that have not yet been comprehensively studied for expert decision making training. In this study, the researcher has examined the use of comics as an alternative to current cognitive training media. In Experiment 1, naval submariners were shown a text-based medium or comic strip and asked to make a decision about the scenario after viewing. The scenario was derived from a situation that submariners were somewhat familiar with …

The Impeding Role Of Initial Unrealistic Goal-Setting On Training Performance: Identifying Underpinning Self-Regulatory Processes And Solutions, Robert C. Brusso

Psychology Theses & Dissertations

The importance of goal-setting within training for enhancing performance has been touted in the literature. Goal-setting theory suggests that setting a moderately difficult, specific goal results in a modest goal-performance discrepancy between the trainee's goal and actual performance level. Such a discrepancy has been found to enhance subsequent performance, as the trainee will employ greater effort and task engagement to resolve the discrepancy. However, research has also shown that the motivating effect of a discrepancy will reverse with repeated feedback indicating that one's performance has fallen short of the desired goal. To date, no prior research has examined the effect …

The Effects Of Display Complexity And Cueing On Monitoring Maternal Fetal Heart Rate Signals, Brittany L. Anderson

Psychology Theses & Dissertations

The present study examined the effects of display complexity and cueing predictability on vigilance performance and measures of subjective stress and workload while monitoring maternal fetal heart rate (MFHR) signals. Seventy-two undergraduate students from Old Dominion University performed a simulated MFHR task and were randomly assigned to monitor one, two, or four displays for critical signals. Half of the participants received cues that were 83% reliable, and the other half received cues that were 55% reliable. Stress and workload were assessed before and after the vigil. It was hypothesized that detection ability would be lower, and the decrement would become …

Social-Cognitive Biases In Simulated Airline Luggage Screening, Jeremy R. Brown

Psychology Theses & Dissertations

The study examined the role that social-cognitive biases play in decision making processes during airline luggage screening, Participants (n = 96) performed a computer simulated task where they tried to detect hidden weapons in 200 x-ray images of passenger luggage. Participants saw each luggage image for either two seconds (high time pressure) or six seconds (low time pressure). In addition, on each trial, participants observed the pictures of the "passenger" to whom the luggage purportedly belongs. The "pre-anchor group" answered questions about the passenger before the luggage image appears, the "post-anchor" group answered questions after the luggage appears, and the …

The A-B Signal Detection Theory Model, Ernesto A. Bustamante

Psychology Theses & Dissertations

The purpose of this research was threefold: (1) Present the a-b SDT model as an alternative framework to overcome the limitations of the underlying SDT model and the traditional measures of sensitivity and criterion setting, (2) Provide empirical support to validate the adequacy of the a-b SDT model, and (3) Conduct a Monte Carlo Study to compare and contrast the strengths and weaknesses of both the traditional and the a-b SDT models across the full spectrum of response values with the goal of providing researchers and practitioners with recommendations regarding the adequacy of each model. The results from this research …

Using Signal Detection Theory To Examine The Effects Of Workload And Likelihood Displays On Human Responses To Alarms, Ernesto A. Bustamante

Psychology Theses & Dissertations

The purpose of this study was to examine the effects of workload and likelihood displays on human responses to alarms through the use of Signal Detection Theory (SDT). Thirty students performed compensatory tracking, resource management, and system monitoring tasks. They interacted with a Binary Alarm System (BAS) or a Likelihood Alarm System (LAS) during varying workload levels. Overall Response Rate (ORR), False Alarm Response Rate (FARR), True Alarm Response Rate (TARR), Sensitivity (d'), and Bias (c), were used as alarm response measures. Root Mean Squared Tracking Error (RMSTE) and Root Mean Squared Resource Management Error (RMSRMF) reflected primary-task performance. Proportion …

Pilot Performance And Eye Movement Activity With Varying Levels Of Display Integration In A Synthetic Vision Cockpit, Julie Michele Stark

Psychology Theses & Dissertations

The primary goal of the present study was to investigate the effects of display integration in a simulated commercial aircraft cockpit equipped with a synthetic vision display. Combinations of display integration level (low/high), display view (synthetic vision view/traditional display), and workload (low/high) were presented to each participant. Sixteen commercial pilots flew multiple approaches under IMC conditions in a moderate fidelity fixed-base part-task simulator. Pilot performance data, visual activity, mental workload, and self-report situation awareness were measured.

Congruent with the Proximity Compatibility Principle, the more integrated display facilitated superior performance on integrative tasks (lateral and vertical path maintenance), whereas a less …

Relationship Between Behavioral Measures In A Driving Simulator And Eeg Activity On Day-Shift And Night-Shift Workers, Jennifer L. Freeman

Psychology Theses & Dissertations

Driver fatigue is a concern that demands a closer investigation into ways of detection and populations at risk. This study examined the relationship between EEG activity and several driving behaviors, as well as differences between day-shift and nightshift workers. Twenty adults, five males and ten females between the ages of 18 and 45, participated in this experiment. Participants included 10 day-shift and 10 night-shift workers. Participants were wired for EEG recording and asked to drive in a 1-hour highway-driving scenario in a driving simulator. Relative powers of alpha, theta and beta were recorded and an EEG index of alertness was …

Stress-Counter Response Training: Flight Simulation Ans Biofeedback, Debra K. Stewart

Psychology Theses & Dissertations

Many attempts to reduce Human Error (HE) in aviation have been applied in the past. However, HE remains the largest reported cause of accidents and incidents in aviation. The present study was designed to implement a novel training method to produce voluntary control over the autonomic nervous system (ANS). Twenty-one participants flew a PC based F-16 flight simulator. There were three conditions: 1. Stress-Counter Response training (SCR), 2, traditional biofeedback training, and 3. A control. It was hypothesized that the SCR training group would show improved physiological control, better flight performance, and lower subjective workload ratings compared to the other …

An Examination Of Individual Differences In Monitoring For Automation Failures, Holly Devries

Psychology Theses & Dissertations

Automation-induced complacency has been documented as a cause or contributing factor in many airplane accidents throughout the last two decades. It is surmised that the condition results when a crew is working in highly reliable automated environments in which they serve as supervisory controllers monitoring system states for occasional automation failures. Although many reports have discussed the dangers of complacency, little empirical research has been produced to substantiate its harmful effects on performance as well as what factors produce complacency. There have been some suggestions, however, that individual characteristics could serve as possible predictors of performance in automated systems.

The …