Zoom Presentation (April 24, 2021), Hackoverflow Technical Society, Chandigarh University, India https://youtu.be/4bMLjx-uMdw
Author: paulyarnold
FORUM: Electric Wahoo
Ross and I were going tile fishing in Atlantic canyons off New York. It was my first time. Reaching these fish requires sending bait 800 to 1,000 feet deep using between two and five pounds of lead weight, depending on the current. We arrived at the canyon and I made my first drop using three … Continue reading FORUM: Electric Wahoo
FORUM: My Big Wahoo
The first pelagic fish which I ever caught was a 49-pound wahoo—one pound shy of a trophy for this species. I caught it by casting a sardine pinned in the nose using a circle hook tied directly to a fluorocarbon (monofilament) leader. The fish was landed in a few seconds after ramming the side of … Continue reading FORUM: My Big Wahoo
Using ODA to Estimate Propensity-Weight-Adjusted Treatment Effects for Multi-Valued Treatments
Paul R. Yarnold, Ph.D., Fred B. Bryant, Ph.D., Ariel Linden, Dr.P.H. Optimal Data Analysis, LLC, Loyola University Chicago, Linden Consulting Group, LLC We demonstrate the use of optimal data analysis to obtain a hierarchically optimal classification tree-based propensity score model for an application with three (treatment) groups, and to assess outcome differences between treatment groups … Continue reading Using ODA to Estimate Propensity-Weight-Adjusted Treatment Effects for Multi-Valued Treatments
FORUM: Heaven on Earth
Dad was a PhD candidate and instructor in Mathematical Statistics at the University of Chicago: Kruskal and Wallis were his advisors. Mom was a PhD candidate in the Department of Psychology at the University of Chicago: she worked with Bettelheim. Always impatient—even before birth, I was born a month prematurely at the University of Chicago … Continue reading FORUM: Heaven on Earth
FORUM: Cardiac Arrest
I was a Research Professor at Northwestern University Medical School in the Department of Emergency Medicine, with multiple affiliations in the Department of Medicine, and an Adjunct Professor of Academic Psychology at the University of Illinois at Chicago. One of my primary areas of expertise (including the focus of my PhD) was antecedents of heart … Continue reading FORUM: Cardiac Arrest
FORUM: Level-1
I first flew model rockets when I was in elementary school, but didn’t have opportunity to advance to more powerful machines until much later in life. When I joined the Tripoli Rocketry Association (TRA) thirty years later I was surprised and excited to learn how hobby rocketry had advanced during my hiatus. I began building … Continue reading FORUM: Level-1
Implementing ODA from Within Stata: Evaluating Test-Retest Reliability of Positive and Negative Emotional States, vs. Personality Traits, Assessed Using Likert Scales, for Males vs. Females
Paul R. Yarnold, Ph.D. and Ariel Linden, Dr.P.H. Optimal Data Analysis, LLC and Linden Consulting Group, LLC This paper illustrates testing directional hypotheses for test-retest Likert ratings of positive and negative emotional states and personality traits for males and females, using the Stata package for implementing ODA. View journal article
FORUM: My First Wahoo
I was living my dream to be an angler aboard a long-range, stand-up, ten-day, deep-sea fishing trip departing in October from America’s Cup Harbor in San Diego. I’d been preparing for two years for this trip while recuperating from a cardiac arrest, reading everything I could find and mail-ordering equipment I’d need on the trip. … Continue reading FORUM: My First Wahoo
Executing ODA from Within Stata: Combining Random Forests and ODA to Estimate Treatment Effects for Multi-Valued Treatments (Invited)
Ariel Linden, Dr. P.H. Linden Consulting Group, LLC This paper demonstrates how the random forest algorithm can be used in conjunction with ODA to estimate treatment effects for multivalued treatments using the new Stata package for implementing ODA. View journal article
FORUM: Friends and Enemies
A second-year graduate student at the University of Illinois at Chicago (UIC), I was working on completing most of my remaining mandatory coursework, and compiling the literature needed to write my proposal for a Master of Arts degree in academic health psychology. At that time literature reviews were conducted manually in the library—there was no … Continue reading FORUM: Friends and Enemies
Implementing ODA from Within Stata: Assessing Split-Half Reliability Using a Polychotomous Attribute
Paul R. Yarnold, Ph.D. and Ariel Linden, Dr. P.H. Optimal Data Analysis, LLC & Linden Consulting Group, LLC This paper illustrates testing a directional (i.e., confirmatory) hypotheses for a split-half reliability study using a polychotomous attribute having four categories, via the Stata package for implementing ODA. View journal article
Implementing ODA from Within Stata: Assessing Parallel-Forms Reliability Using a Binary and an Ordered Attribute
Paul R. Yarnold, Ph.D. and Ariel Linden, Dr. P.H. Optimal Data Analysis, LLC & Linden Consulting Group, LLC This paper illustrates testing a directional (i.e., confirmatory) hypotheses for a parallel-forms reliability study using a binary and an ordered measure, via the Stata package for implementing ODA. View journal article
Executing ODA from Within Stata: Combining Boosted Regression and ODA to Estimate Treatment Effects for Multi-Valued Treatments
Ariel Linden, Dr. P.H. and Paul R. Yarnold, Ph.D. Linden Consulting Group, LLC & Optimal Data Analysis, LLC This paper demonstrates how boosted regression can be used in conjunction with ODA to estimate treatment effects for multivalued treatments using the new Stata package for implementing ODA. View journal article
FORUM: Joyful Surprise
I was born in the dawn of the space race, 15 months before the USSR launched the first artificial Earth satellite, Sputnik 1, into an elliptical low Earth orbit. The excitement of the ensuing space race—what it required of and discovered for humanity, influenced the course of my life until today. My parents said, though … Continue reading FORUM: Joyful Surprise
Implementing ODA from Within Stata: Confirmatory and Exploratory Inter-Rater Reliability Hypothesis with a Three-Category Ordinal Rating
Paul R. Yarnold, Ph.D. and Ariel Linden, Dr. P.H. Optimal Data Analysis, LLC & Linden Consulting Group, LLC This paper illustrates testing directional (confirmatory) and non-directional (exploratory) hypotheses for an inter-rater reliability study using a three-category ordinal measure, via the Stata package for implementing ODA. View journal article
ODA Model Perfectly Predicts S&P 500 Declines of 20% or Greater
Paul R. Yarnold. Ph.D. Optimal Data Analysis, LLC The Shiller price-to-earnings (P/E) ratio assesses mean inflation-adjusted earnings in the prior decade.1 Five times over the past 150 years this index consistently exceeded 30 during a bull market run. Two times were during the Great Depression and the “dot-com” bubble, and both resulted in record declines … Continue reading ODA Model Perfectly Predicts S&P 500 Declines of 20% or Greater
Implementing ODA from Within Stata: Exploratory Hypothesis, Three-Category Class Variable, Continuous Attribute
Paul R. Yarnold, Ph.D. and Ariel Linden, Dr. P.H. Optimal Data Analysis, LLC & Linden Consulting Group, LLC This paper describes how to test a non-directional (exploratory) hypothesis for a design relating a three-category class (“dependent”) variable and a continuous attribute vis-à-vis the Stata package for implementing ODA. View journal article
FORUM: Monkey Island
Ross and I were on our second trip to Panama for another week of in-shore angling. The weather was calm so we did a bit of exploring in-between fishing stops. A guide spoke of a near-by place called “Monkey Island.” He said he could take us on a short skiff ride to a small island … Continue reading FORUM: Monkey Island
FORUM: Interviewing
Assessing the Authenticity of an Interviewee In a 2014 Auto Bild interview, Elon Musk revealed he assesses the authenticity of an interviewee’s claimed experience by asking for a detailed description of the most difficult problem(s) the interviewee previously worked on and solved. According to Musk, “The people who really solved the problem know exactly how they solved … Continue reading FORUM: Interviewing
