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Articles 181 - 206 of 206

Full-Text Articles in Human Factors Psychology

Multicenter Handoff Collaborative, Philip E. Greilich, Joseph R. Keebler Oct 2017

Multicenter Handoff Collaborative, Philip E. Greilich, Joseph R. Keebler

Publications

Communication and team-based care are at the heart of patient safety. As anesthesia professionals, we witness this at its very best and worst when transferring patients to and from the operating room (see article by Dr. Lorinc on types of transfers in this issue). In response, we have an opportunity to take a leading role in redesigning the most ubiquitous teaming event in hospitals in a manner that promotes team-based behaviors. The impact of unreliable handoffs on communication failures and medical errors is well known. To combat this issue, mandates by The Joint Commission (TJC) in 2006 and the American …


Temperament Factors And Dimensional, Latent Bifactor Models Of Child Psychopathology: Transdiagnostic And Specific Associations In Two Youth Samples, Benjamin L. Hankin, Elyssia Poggi Davis, Hannah Snyder, Jami F. Young, Laura M. Glynn, Curt A. Sandman Mar 2017

Temperament Factors And Dimensional, Latent Bifactor Models Of Child Psychopathology: Transdiagnostic And Specific Associations In Two Youth Samples, Benjamin L. Hankin, Elyssia Poggi Davis, Hannah Snyder, Jami F. Young, Laura M. Glynn, Curt A. Sandman

Psychology Faculty Articles and Research

Common emotional and behavioral symptoms co-occur and are associated with core temperament factors. This study investigated links between temperament and dimensional, latent psychopathology factors, including a general common psychopathology factor (p factor) and specific latent internalizing and externalizing liabilities, as captured by a bifactor model, in two independent samples of youth. Specifically, we tested the hypothesis that temperament factors of negative affectivity (NA), positive affectivity (PA), and effortful control (EC) could serve as both transdiagnostic and specific risks in relation to recent bifactor models of child psychopathology. Sample 1 included 571 youth (average age 13.6, SD = 2.37, range 9.3–17.5) …


Understanding Teamwork In The Provision Of Cancer Care: Highlighting The Role Of Trust, Elizabeth H. Lazzara, Joseph R. Keebler, Soosi Day, Deborah Diazgranados, Minggui Pan, Michael A. King, Shin-Ping Tu Nov 2016

Understanding Teamwork In The Provision Of Cancer Care: Highlighting The Role Of Trust, Elizabeth H. Lazzara, Joseph R. Keebler, Soosi Day, Deborah Diazgranados, Minggui Pan, Michael A. King, Shin-Ping Tu

Publications

Team science research has indicated that trust is a critical variable of teamwork, contributing greatly to a team’s performance. Trust has long been examined in health care with research focusing on the development of trust by patients with their health care practitioners. Studies have indicated that trust is linked to patient satisfaction, adherence to treatment, continuity of care, and improved outcomes. We explore the construct of trust using a case example of a patient who received a surgical procedure for a precancerous polyp. We apply the principle of trust to the case as well as present the literature on trust …


Highlighting Trust In The Provision Of Cancer Care, Elizabeth Lazzara, Joseph Keebler, Soosi Day, Deborah Diazgranados, Minngui Pan, Mike King, Shin-Ping Tu Feb 2016

Highlighting Trust In The Provision Of Cancer Care, Elizabeth Lazzara, Joseph Keebler, Soosi Day, Deborah Diazgranados, Minngui Pan, Mike King, Shin-Ping Tu

Publications

Slides:

  • Patient Case
  • Definition & Explanation of Trust
  • Application of Trust to Cancer Case
  • Implications for Clinical Care
  • Implications for Research


Test-Retest Reliability Of The Sway Balance Mobile Application, Ryan Z. Amick, Alex Chaparro, Jeremy A. Patterson, Michael J. Jorgensen Jul 2015

Test-Retest Reliability Of The Sway Balance Mobile Application, Ryan Z. Amick, Alex Chaparro, Jeremy A. Patterson, Michael J. Jorgensen

Publications

The SWAY Balance Mobile Application is an FDA-cleared balance testing system which uses the built-in tri-axial accelerometers of a mobile electronic device to objectively assess postural movement. The system was designed to provide a means of quantitative balance assessment in clinical and on-field environments. The purpose of this study was to determine the intrasession and intersession reliability, as well as the minimum difference to be considered real, of the SWAY Balance Mobile Application.


The Template Of Events For Applied And Critical Healthcare Simulation (Teach Sim): A Tool For Systematic Simulation Scenario Design, Lauren E. Benishek, Elizabeth H. Lazzara, William L. Gaught, Lygia L. Arcaro, Okuda Yasuharu, Eduardo Salas Feb 2015

The Template Of Events For Applied And Critical Healthcare Simulation (Teach Sim): A Tool For Systematic Simulation Scenario Design, Lauren E. Benishek, Elizabeth H. Lazzara, William L. Gaught, Lygia L. Arcaro, Okuda Yasuharu, Eduardo Salas

Publications

Simulation-based training (SBT) affords practice opportunities for improving the quality of clinicians’ technical and nontechnical skills. However, the development of practice scenarios is a process plagued by a set of challenges that must be addressed for the full learning potential of SBT to be realized. Scenario templates are useful tools for assisting with SBT and navigating its inherent challenges. This article describes existing SBT templates, explores considerations in choosing an appropriate template, and introduces the Template of Events for Applied and Critical Healthcare Simulation (TEACH Sim) as a tool for facilitating the formation of practice scenarios in accordance with an …


Promoting Teamwork In Translational Medical Teams: Insights And Recommendations From Science And Practice, Lauren E. Benishek, Ashley M. Hughes, Megan E. Gregory, Shirley C. Sonesh, Eduardo Salas, Elizabeth H. Lazzara Aug 2014

Promoting Teamwork In Translational Medical Teams: Insights And Recommendations From Science And Practice, Lauren E. Benishek, Ashley M. Hughes, Megan E. Gregory, Shirley C. Sonesh, Eduardo Salas, Elizabeth H. Lazzara

Publications

Translational medical teams are transdisciplinary, highly collaborative, and operate within dynamic environments to solve time-sensitive and complex problems. These teams are tasked with turning observations in the laboratory and clinic into effective interventions that improve the health of individuals and the public. The nature of the problems they seek to solve requires coordination among clinicians, scientists, and experts from various scientific disciplines. Characteristically, translational medical teams have complex compositions, structure, and pluralistic goals, which pose significant challenges and barriers to enacting effective teamwork, compromising team performance. Given these challenges, it is imperative to glean insights from teams research and the …


Differential Effects Of Refractive Blur On Day And Nighttime Driving Performance, Joanne M. Wood, Michael J. Collins, Alex Chaparro, Ralph Marszalek, Trent Carberry, Philippe Lacherez, Byoung Sun Chu Apr 2014

Differential Effects Of Refractive Blur On Day And Nighttime Driving Performance, Joanne M. Wood, Michael J. Collins, Alex Chaparro, Ralph Marszalek, Trent Carberry, Philippe Lacherez, Byoung Sun Chu

Publications

PURPOSE. To investigate the effect of different levels of refractive blur on real-world driving performance measured under day and nighttime conditions.

METHODS. Participants included 12 visually normal, young adults (mean age = 25.+- 5.2 years) who drove an instrumented research vehicle around a 4 km closed road circuit with three different levels of binocular spherical refractive blur (+0.50 diopter sphere [DS], +1.00 DS, +2.00 DS) compared with a baseline condition. The subjects wore optimal spherocylinder correction and the additional blur lenses were mounted in modified fullfield goggles; the order of testing of the blur conditions was randomized. Driving …


Patient Safety In The Cardiac Operating Room: Human Factors And Teamwork: A Scientific Study From The American Heart Association, Joyce A. Wahr, Richard L. Prager, J. H. Abernathy Iii, Elizabeth A. Martinez, Eduardo Salas, Patricia C. Seifert, Robert C. Groom, Bruce D. Spiess, Bruce E. Searles, Thoralf M. Sundt Iii, Juan A. Sanchez, Scott A. Shappell, Michael H. Culig, Elizabeth H. Lazzara, David C. Fitzgerald, Vinod H. Thourani, Pirooz Eghtesady, John S. Ikonomidis, Michael R. England, Frank W. Selke, Nancy A. Nussmeier Sep 2013

Patient Safety In The Cardiac Operating Room: Human Factors And Teamwork: A Scientific Study From The American Heart Association, Joyce A. Wahr, Richard L. Prager, J. H. Abernathy Iii, Elizabeth A. Martinez, Eduardo Salas, Patricia C. Seifert, Robert C. Groom, Bruce D. Spiess, Bruce E. Searles, Thoralf M. Sundt Iii, Juan A. Sanchez, Scott A. Shappell, Michael H. Culig, Elizabeth H. Lazzara, David C. Fitzgerald, Vinod H. Thourani, Pirooz Eghtesady, John S. Ikonomidis, Michael R. England, Frank W. Selke, Nancy A. Nussmeier

Publications

The cardiac surgical operating room (OR) is a complex environment in which highly trained subspecialists interact with each other using sophisticated equipment to care for patients with severe cardiac disease and significant comorbidities. Thousands of patient lives have been saved or significantly improved with the advent of modern cardiac surgery. Indeed, both mortality and morbidity for coronary artery bypass surgery have decreased during the past decade. Nonetheless, the highly skilled and dedicated personnel in cardiac ORs are human and will make errors. Refined techniques, advanced technologies, and enhanced coordination of care have led to significant improvements in cardiac surgery outcomes.


Lateralized Difference In Tympanic Membrane Temperature: Emotion And Hemispheric Activity, Ruth E. Propper, Tad T. Brunyé Mar 2013

Lateralized Difference In Tympanic Membrane Temperature: Emotion And Hemispheric Activity, Ruth E. Propper, Tad T. Brunyé

Department of Psychology Faculty Scholarship and Creative Works

We review literature examining relationships between tympanic membrane temperature (TMT), affective/motivational orientation, and hemispheric activity. Lateralized differences in TMT might enable real-time monitoring of hemispheric activity in real-world conditions, and could serve as a corroborating marker of mental illnesses associated with specific affective dysregulation. We support the proposal that TMT holds potential for broadly indexing lateralized brain physiology during tasks demanding the processing and representation of emotional and/or motivational states, and for predicting trait-related affective/motivational orientations. The precise nature of the relationship between TMT and brain physiology, however, remains elusive. Indeed the limited extant research has sampled different participant populations …


Useful Field Of View Predicts Driving In The Presence Of Distracters, Joanne M. Wood, Alex Chaparro, Philippe Lacherez, Louise Hickson Apr 2012

Useful Field Of View Predicts Driving In The Presence Of Distracters, Joanne M. Wood, Alex Chaparro, Philippe Lacherez, Louise Hickson

Publications

Purpose. The Useful Field of View (UFOV®) test has been shown to be highly effective in predicting crash risk among older adults. An important question which we examined in this study is whether this association is due to the ability of the UFOV to predict difficulties in attention-demanding driving situations that involve either visual or auditory distracters.

Methods. Participants included 92 community-living adults (mean age 73.6 +- 5.4 years; range 65– 88 years) who completed all three subtests of the UFOV involving assessment of visual processing speed (subtest 1), divided attention (subtest 2), and selective attention (subtest 3); driving safety …


Latent Print Examination And Human Factors: Improving The Practice Through A Systems Approach: The Report Of The Expert Working Group On Human Factors In Latent Print Analysis, David H. Kaye, Thomas Busey, Melissa R. Gische, Gerry Laporte, Scott A. Shappell, Et Al. Feb 2012

Latent Print Examination And Human Factors: Improving The Practice Through A Systems Approach: The Report Of The Expert Working Group On Human Factors In Latent Print Analysis, David H. Kaye, Thomas Busey, Melissa R. Gische, Gerry Laporte, Scott A. Shappell, Et Al.

Publications

Fingerprints have provided a valuable method of personal identification in forensic science and criminal investigations for more than 100 years. Fingerprints left at crime scenes generally are latent prints—unintentional reproductions of the arrangement of ridges on the skin made by the transfer of materials (such as amino acids, proteins, polypeptides, and salts) to a surface. Palms and the soles of feet also have friction ridge skin that can leave latent prints. The examination of a latent print consists of a series of steps involving a comparison of the latent print to a known (or exemplar) print. Courts have accepted latent …


Tools For Evaluating Team Performance In Simulation-Based Training, Michael A. Rosen, Sallie J. Weaver, Elizabeth H. Lazzara, Eduardo Salas, Teresa Wu, Salvatore Silvestri, Nicola Schiebel, Sandra Almeida, Heidi B. King Oct 2010

Tools For Evaluating Team Performance In Simulation-Based Training, Michael A. Rosen, Sallie J. Weaver, Elizabeth H. Lazzara, Eduardo Salas, Teresa Wu, Salvatore Silvestri, Nicola Schiebel, Sandra Almeida, Heidi B. King

Publications

Teamwork training constitutes one of the core approaches for moving healthcare systems toward increased levels of quality and safety, and simulation provides a powerful method of delivering this training, especially for face-paced and dynamic specialty areas such as Emergency Medicine. Team performance measurement and evaluation plays an integral role in ensuring that simulation-based training for teams (SBTT) is systematic and effective. However, this component of SBTT systems is overlooked frequently. This article addresses this gap by providing a review and practical introduction to the process of developing and implementing evaluation systems in SBTT. First, an overview of team performance evaluation …


Simulation-Based Team Training At The Sharp End: A Qualitative Study Of Simulation-Based Team Training Design, Implementation, And Evaluation In Healthcare, Sallie J. Weaver, Eduardo Salas, Rebecca Lyons, Elizabeth H. Lazzara, Michael A. Rosen, Deborah Diazgranados, Julia G. Grim, Jeffrey S. Augenstein, David J. Birnbach, Heidi King Oct 2010

Simulation-Based Team Training At The Sharp End: A Qualitative Study Of Simulation-Based Team Training Design, Implementation, And Evaluation In Healthcare, Sallie J. Weaver, Eduardo Salas, Rebecca Lyons, Elizabeth H. Lazzara, Michael A. Rosen, Deborah Diazgranados, Julia G. Grim, Jeffrey S. Augenstein, David J. Birnbach, Heidi King

Publications

This article provides a qualitative review of the published literature dealing with the design, implementation, and evaluation of simulation-based team training (SBTT) in healthcare with the purpose of providing synthesis of the present state of the science to guide practice and future research. A systematic literature review was conducted and produced 27 articles meeting the inclusion criteria. These articles were coded using a low-inference content analysis coding scheme designed to extract important information about the training program. Results are summarized in 10 themes describing important considerations for what occurs before, during, and after a training event. Both across disciplines and …


An Investigation Of Interpersonal Disruptions And Secondary Traumatic Stress Among Mental Health Therapists, Rachael Ann Robinson-Keilig Aug 2010

An Investigation Of Interpersonal Disruptions And Secondary Traumatic Stress Among Mental Health Therapists, Rachael Ann Robinson-Keilig

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Mental health therapists who work with victims of trauma are often exposed to vivid descriptions of traumatic events and strong emotional expressions from their clients. Research within the last fifteen years has started to explore the impact of this indirect form of trauma exposure on therapists who treat trauma clients.

The purpose of this study was to explore the prevalence of interpersonal and sexual disruptions as symptoms of secondary traumatic stress/vicarious trauma among practicing mental health therapists, to understand how various therapist characteristics predict interpersonal and sexual disruptions, and to explore the role that gender and prior trauma history play …


Depressive Symptoms And Marital Satisfaction In The Context Of Chronic Disease: A Longitudinal Dyadic Analysis, Rachel Pruchno, Maureen Wilson-Genderson, Francine P Cartwright Aug 2009

Depressive Symptoms And Marital Satisfaction In The Context Of Chronic Disease: A Longitudinal Dyadic Analysis, Rachel Pruchno, Maureen Wilson-Genderson, Francine P Cartwright

Rowan-Virtua School of Osteopathic Medicine Departmental Research

These analyses examined the longitudinal relationships between depressive symptoms and marital satisfaction over a 2-year period as experienced by 315 patients with end-stage renal disease and their spouses. Using multilevel modeling, the authors examined both individual and cross-partner effects of depressive symptoms and marital satisfaction on patients and spouses, testing bidirectional causality. Results indicate that mean and time-varying depressive symptoms of both patients and spouses were associated with their own marital satisfaction. Although mean marital satisfaction was associated with own depressive symptoms for both patients and spouses, time-varying marital satisfaction did not affect depressive symptoms for either patients or spouses. …


A Pilot Study Of Bibliotherapy To Reduce Alcohol Problems Among Patients In A Hospital Trauma Center, Paul Amrhein, Timothy Apodaca, William R. Miller, Carol R. Schermer Jul 2009

A Pilot Study Of Bibliotherapy To Reduce Alcohol Problems Among Patients In A Hospital Trauma Center, Paul Amrhein, Timothy Apodaca, William R. Miller, Carol R. Schermer

Department of Psychology Faculty Scholarship and Creative Works

Because alcohol use plays a major role in many injuries that require hospital care, there is increasing interest in developing interventions to address alcohol problems among emergency department and trauma center patients. The aim of the current study was to extend past research on brief interventions by investigating the use of a self-help manual to treat problem drinkers in a hospital trauma center. Forty injured patients who were either intoxicated at the time of injury or screened positive for harmful drinking were randomly assigned to receive either a brief assessment and a self-help booklet with no more than 5 minutes …


Promoting Teamwork: An Event-Based Approach To Simulation-Based Teamwork Training For Emergency Medicine Residents, Michael A. Rosen, Eduardo Salas, Teresa S. Wu, Salvatore Silvestri, Elizabeth H. Lazzara, Rebecca Lyons, Sally J. Weaver, Heidi B. King Jul 2008

Promoting Teamwork: An Event-Based Approach To Simulation-Based Teamwork Training For Emergency Medicine Residents, Michael A. Rosen, Eduardo Salas, Teresa S. Wu, Salvatore Silvestri, Elizabeth H. Lazzara, Rebecca Lyons, Sally J. Weaver, Heidi B. King

Publications

The growing complexity of patient care requires that emergency physicians (EPs) master not only knowledge and procedural skills, but also the ability to effectively communicate with patients and other care providers and to coordinate patient care activities. EPs must become good team players, and consequently an emergency medicine (EM) residency program must systematically train these skills. However, because teamwork-related competencies are relatively new considerations in health care, there is a gap in the methods available to accomplish this goal. This article outlines how teamwork training for residents can be accomplished by employing simulation-based training (SBT) techniques and contributes tools and …


Simulation-Based Training For Patient Safety: 10 Principles That Matter, Eduardo Salas, Katherine A. Wilson, Elizabeth Lazzara, Heidi B. King, Jeffery S. Augenstein Mar 2008

Simulation-Based Training For Patient Safety: 10 Principles That Matter, Eduardo Salas, Katherine A. Wilson, Elizabeth Lazzara, Heidi B. King, Jeffery S. Augenstein

Publications

Simulation-based training can improve patient care when factors influencing its design, delivery, evaluation, and transfer are taken into consideration. In this paper, we provide a number of principles and practical tips that organizations in health care can use to begin implementing effective simulation-based training as a way to enhance patient safety. We commend the health care community for their efforts thus far. We hope that the information provided in this paper will encourage thinking beyond the "bells and whistles" of the simulation and bring to light full potential of simulation-based training in health care and patient safety.


Brighter Noise: Sensory Enhancement Of Perceived Loudness By Concurrent Visual Stimulation, Yoav Arieh, Eric C. Odgaard, Lawrence E. Marks Jun 2004

Brighter Noise: Sensory Enhancement Of Perceived Loudness By Concurrent Visual Stimulation, Yoav Arieh, Eric C. Odgaard, Lawrence E. Marks

Department of Psychology Faculty Scholarship and Creative Works

Two experiments investigated the effect of concurrently presented light on the perceived loudness of a low-level burst of white noise. The results suggest two points. First, white noise presented with light tends to be rated as louder than noise presented alone. Second, the enhancement in loudness judgments is resistant to two experimental manipulations: varying the probability that light accompanies sound and shifting from a rating method to a forced choice comparison. Both manipulations were previously shown to eliminate a complementary noise-induced enhancement in ratings of brightness. Whereas noise-induced enhancement of brightness seems to reflect a late-stage decisional process, such as …


Drug Of Choice As A Predictor Of Program Completion In A 12-Week Intensive Outpatient Program And Continuing Care Program, James R. Myers Jan 2000

Drug Of Choice As A Predictor Of Program Completion In A 12-Week Intensive Outpatient Program And Continuing Care Program, James R. Myers

Theses, Dissertations and Capstones

This study consisted of a one year examination of a twelve week Intensive Outpatient Program (IOP), followed by continuing care treatment, coupled with required attendance to a Twelve Step AA/NA Program. This study detailed the treatment plan available at a local Intensive Outpatient Program in Southern West Virginia. A sample, separating alcoholics from other substance abusers to obtain an estimated completion rate was used.

Tills thesis comprised a one-year history of subjects (6/30/98 -07/01/99). A total of 84 subjects entered into the Intensive Outpatient Program (IOP) within the above time frame. Determination of completion rates was based on a categorical …


The Relationship Between Alcohol Use And Anger Experience And Expression, Jennifer L. Saunders Jan 1999

The Relationship Between Alcohol Use And Anger Experience And Expression, Jennifer L. Saunders

Theses, Dissertations and Capstones

The study explored the relationship between alcohol use and the experience and expression of anger. Thirty male subjects between the ages of 20 and 35 were involved in the study. Fifteen enrolled in a Driving Under the Influence (DUI) class and fifteen enrolled in one of two introductory level behavioral science classes, without a history of DUI, were selected to participate in the research. The results of the analysis of variance (ANOVA) indicated no significant relationship between alcohol use and state anger (how angry a person is at any given moment) or alcohol use and expression of anger. There was, …


The Role Of Alcohol And Stress On Measures Of Depression And Anxiety Among College Students, Jeffrey F. Porter Aug 1997

The Role Of Alcohol And Stress On Measures Of Depression And Anxiety Among College Students, Jeffrey F. Porter

Masters Theses

In clinical literature regarding the effects of regular alcohol use, psychological benefits of moderate consumption have been suggested (Neff & Husaini, 1982; Neff, 1984; Neff & Husaini, 1985; Neff, 1985; Neff, 1986; Neff, 1993, Lipton, 1994). Despite the diverse groups with which this theory has been examined, no published studies have lookeq specifically at the high-risk group of college undergraduates. Subjects were surveyed to assess their typical drinking behavior, the number of stressful events they had experienced within the past 12 months, their perceived social support, and depressive and anxiety symptoms they experienced within the seven days leading up to …


Tyrosine As A Countermeasure To Performance Decrement During Sleep Loss, Douglas A. Wiegmann, David F. Neri, Robert R. Stanny, Scott Shappell, Andrew M. Mccardie, David L. Mckay Apr 1994

Tyrosine As A Countermeasure To Performance Decrement During Sleep Loss, Douglas A. Wiegmann, David F. Neri, Robert R. Stanny, Scott Shappell, Andrew M. Mccardie, David L. Mckay

Publications

The fatigue and cognitive performance deficits associated with sleep loss and stress have motivated the search for effective nonpharmacological countermeasures. The purpose of the present study was to examine the potential behavioral effects of tyrosine, an amino-acid presursor to dopamine and norepinephrine, during an episode of continuous nighttime work involving one night of sleep loss.


Effects Of Dextro-Methamphetamine On Subjective Fatigue, C. A. Dejohn, Scott Shappell, D. F. Neri Aug 1992

Effects Of Dextro-Methamphetamine On Subjective Fatigue, C. A. Dejohn, Scott Shappell, D. F. Neri

Publications

Declining aircrew performance during periods of sustained flight operations (SUSOPs) has underscored the need to develop effective countermeasures. This paper reports on the ability of the central nervous system (CNS) stimulant d-methamphetamine to alleviate the detrimental effects of a simulated SUSOPs on subjective fatigue. Subjective fatigue was repeatedly measured by three questionnaires. The simulated SUSOP started at 1800 and consisted of a 9-h planning session followed by 4 h of rest and a 14-h mission. After 6 h of sleep, the 9/4/14 work/rest/work pattern was repeated. At 4 1/2 h into the second mission, 13 subjects were administered 10 mg …


An Introduction To The Five-Factor Model And Its Applications, Robert R. Mccrae, Oliver P. John Jan 1992

An Introduction To The Five-Factor Model And Its Applications, Robert R. Mccrae, Oliver P. John

United States Public Health Resources

The five-factor model of personality is a hierarchical organization of personality traits in terms of five basic dimensions: Extraversion, Agreeableness, Conscientiousness, Neuroticism, and Openness to Experience. Research using both natural language adjectives and theoretically based personality questionnaires supports the comprehensiveness of the model and its applicability across observers and cultures. This article summarizes the history of the model and its supporting evidence; discusses conceptions of the nature of the factors; and outlines an agenda for theorizing about the origins and operation of the factors. We argue that the model should prove useful both for individual assessment and for the elucidation …