How to Assess the Inter-Method (Parallel-Forms) Reliability of Ratings Made on Ordinal Scales: Emergency Severity Index (Version 3) and Canadian Triage Acuity Scale

Paul R. Yarnold Optimal Data Analysis, LLC An exact, optimal (“maximum-accuracy”) psychometric methodology for assessing inter-method reliability for measures involving ordinal ratings is used to evaluate and compare two emergency medicine triage algorithms—both of which classify patients into one of five ordinal categories. Ten raters independently evaluated the identical set of 200 patients, five with … Continue reading How to Assess the Inter-Method (Parallel-Forms) Reliability of Ratings Made on Ordinal Scales: Emergency Severity Index (Version 3) and Canadian Triage Acuity Scale

How to Assess Inter-Observer Reliability of Ratings Made on Ordinal Scales: Evaluating and Comparing the Emergency Severity Index (Version 3) and Canadian Triage Acuity Scale

Paul R. Yarnold Optimal Data Analysis, LLC An exact, optimal (“maximum-accuracy”) psychometric methodology for assessing inter-observer reliability for measures involving ordinal ratings is used to evaluate and compare two emergency medicine triage algorithms—both of which classify patients into one of five ordinal categories. Ten raters independently evaluated the identical set of 200 patients, five with … Continue reading How to Assess Inter-Observer Reliability of Ratings Made on Ordinal Scales: Evaluating and Comparing the Emergency Severity Index (Version 3) and Canadian Triage Acuity Scale

Finding Joy in the Past, Present, and Future: The Relationship Between Type A Behavior and Savoring Beliefs Among College Undergraduates

Fred B. Bryant & Paul R. Yarnold Optimal Data Analysis, LLC Prior research investigating savoring behaviors and Type A behavior (TAB) found that extreme Type A undergraduates are most likely to score in the highest quintile on self-congratulation, and in the lowest three quintiles on memory-building. This study used scores on past-, present-, and future-focused … Continue reading Finding Joy in the Past, Present, and Future: The Relationship Between Type A Behavior and Savoring Beliefs Among College Undergraduates

Type A Behavior, Pessimism and Optimism Among College Undergraduates

Fred B. Bryant & Paul R. Yarnold Optimal Data Analysis, LLC This study used scores on measures of dispositional optimism and pessimism to discriminate 117 extreme Type A versus 131 extreme Type B college undergraduates. Consistent with a priori hypotheses the analysis revealed that Type As were significantly less pessimistic, and significantly more optimistic, than … Continue reading Type A Behavior, Pessimism and Optimism Among College Undergraduates

“A Statistical Guide for the Ethically Perplexed” (Chapter 4, Panter & Sterba, Handbook of Ethics in Quantitative Methodology, Routledge, 2011): Clarifying Disorientation Regarding the Etiology and Meaning of the Term Optimal as Used in the Optimal Data Analysis (ODA) Paradigm

Paul R. Yarnold Optimal Data Analysis, LLC The authors of Chapter 4 complain that use of the word “optimal” in the name Optimal Data Analysis (ODA) is unethical because it implies that alternative data analysis methods are less than optimal. The present Errata note addresses this misunderstanding. View journal article

“Predicting In-Hospital Mortality of Patients with AIDS-Related Pneumocystis carinii Pneumonia: An Example of Hierarchically Optimal Classification Tree Analysis” (Yarnold et al., Statistics in Medicine, 1997, 16, 1451-1463): Corrected Illustration of CTA Model

Paul R. Yarnold Optimal Data Analysis, LLC The lead note in the Errata section of Optimal Data Analysis presents the corrected illustration of the first CTA model published in the field of medicine, two decades ago. View journal article

Type A Behavior and Savoring Among College Undergraduates: Enjoy Achievements Now—Not Later

Fred B. Bryant & Paul R. Yarnold Optimal Data Analysis, LLC Recent research tested the a priori hypothesis that Type A Behavior (TAB) undermines enjoyment of leisure time, and that this effect is mediated by savoring responses which hamper enjoyment. Findings suggested that the hypothesized A-B differences in savoring reflect differences in perfectionism rather than … Continue reading Type A Behavior and Savoring Among College Undergraduates: Enjoy Achievements Now—Not Later

Hierarchically Optimal Classification Tree Analysis of Adverse Drug Reactions Secondary to Warfarin Therapy

Robert C. Soltysik & Paul R. Yarnold Optimal Data Analysis, LLC Identification and detection of adverse drug reactions (ADRs) is critical to patient safety improvement, and warfarin is a medication known to be associated with a high rate of ADRs. Hierarchically optimal CTA was used to predict ADRs attributable to medications taken in addition to … Continue reading Hierarchically Optimal Classification Tree Analysis of Adverse Drug Reactions Secondary to Warfarin Therapy

Emergency Severity Index (Version 3) Score Predicts Hospital Admission

Paul R. Yarnold & Robert C. Soltysik Optimal Data Analysis, LLC Hospital admission status, Emergency Severity Index (ESI) Version 3 triage score, and binary indicators of whether lab work or radiological examinations were completed in the Emergency Department (ED), were available for 160,471 patients seen over a three-year period in the ED of a leading … Continue reading Emergency Severity Index (Version 3) Score Predicts Hospital Admission