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#irt

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mʕ•ﻌ•ʔm bitPickup

#traffic #mobility #climateCalamity #climate #CO2 #journalism #IRT #bus

Please welcome the new #publicTransport system.

This obviously is not a train and misses the extreme savings from steel #railway #train technics. But it's a giant step forward in the thinking about how to handle and speed up city traffic by public mass transport.

The top 1/4 of most intelligent chinese are more than the entire population of the US.

In the end maybe they might save us all ..

@SheDrivesMobility

Public
Malaysia Public Transport

On 6 September 2023, there was signing ceremony for #MoU between #Iskandar Regional Development Authority (#IRDA) & Korea Railroad Research Institute (#KRRI).

The MoU is to carry out Proof of Concept (#POC) for Traffic Signal Prioritization System (#TSPS) related to the Iskandar Rapid Transit (#IRT) project.

The POC will help IRT in terms of efficient operation & smooth traffic along the #Tebrau IRT Main Trunk at Jalan Tebrau when it is implemented soon.

(Photos by IRT)

Two people showing signed agreements, with one person -- the witness -- standing on the side.
A group of people standing in front of a table.
#IskandarRapidTransit
Public
Malaysia Public Transport

After much delay over the years, Johor Bahru’s Bus Rapid Transit (#BRT) is targeted for stage-one operation rollout by the third quarter of 2025.

Deemed as the backbone of the Iskandar region’s revamped #publictransport system known as Iskandar Rapid Transit (#IRT), the 55km high-capacity dedicated #buslane is set to feature three lines, namely #IskandarPuteri with 15km stretch, #Skudai (18km), and #Tebrau (22km).

Read more: thevibes.com/articles/news/987

Map of the three lines and 22 stations of the Iskandar Rapid Transit or Bus Rapid Transit in Johor Bahru. Photo is from the article linked.
A model of Perling BRT Station. Photo is from the article linked.
The proposed site of Anjung BRT station. Photo is from the article linked.
A model of Perling BRT Station located in the median of a road. Photo is from the article linked.
#bus#busrapidtransit#Johor
Public
Jan R. Boehnke

Another #PeerReview finished.

Paper ~ 2000 words
Review ~ 1500 words
Duration ~ 2 hours

I am still a fan of what #IRT #ItemBanking methods can deliver in the space where items can be reduced to one (or multiple linked) dimensions.

Just highlighting this visionary paper that inspired me during the time of my PhD greatly
rdcu.be/dku0h
and where we until today have done little to reach the full potential of such applications.

link.springer.comThe future of outcomes measurement: item banking, tailored short-forms, and computerized adaptive assessment
#HRQL#PROMIS#ShortForms
Public
Jan R. Boehnke

Last week "Quality of Life Research" #ISOQOL published 4 papers:
link.springer.com/journal/1113

For example,

#participatory item development & #IRT evaluation of the Vancouver Airways #Health Literacy Tool
rdcu.be/dgW5x
#Psychometrics

#HRQL among homeless individuals in Germany during the #COVID19 pandemic
link.springer.com/article/10.1

Secondary pooled analysis of the patient-reported outcomes in the ASPIRE I + II #RCTs in people living with #MDE
link.springer.com/article/10.1
#NCT03039192 NCT03097133

SpringerLinkQuality of Life Research | Online first articlesOnline first articles listing for Quality of Life Research
Public
Jan R. Boehnke

Last week Quality of Life Research published five new articles:
link.springer.com/journal/1113
#ISOQOL #HRQL

For example:

#IRT Evaluation of the German PROMIS® Pain interference items:
link.springer.com/article/10.1
#Psychometrics

Chronic kidney disease-associated pruritus and #HRQL in Italy, France, Ireland, UK, Spain:
link.springer.com/article/10.1

Mental #HRQL of mothers of children with congenital heart disease from first open-heart surgery until the children were 13 years of age
link.springer.com/article/10.1

SpringerLinkQuality of Life Research | Online first articlesOnline first articles listing for Quality of Life Research
Public
Jan R. Boehnke

Paper presenting an #Rstats toolbox for score-based measurement invariance tests in item response models
link.springer.com/article/10.3

The paper offers a review of formal definitions, a workflow, and works as a meta-package using the psychotools, mirt & strucchange packages.

SpringerLinkAn R toolbox for score-based measurement invariance tests in IRT models - Behavior Research MethodsThe detection of differential item functioning (DIF) is a central topic in psychometrics and educational measurement. In the past few years, a new family of score-based tests of measurement invariance has been proposed, which allows the detection of DIF along arbitrary person covariates in a variety of item response theory (IRT) models. This paper illustrates the application of these tests within the R system for statistical computing, making them accessible to a broad range of users. This presentation also includes IRT models for which these tests have not previously been investigated, such as the generalized partial credit model. The paper has three goals: First, we review the ideas behind score-based tests of measurement invariance. Second, we describe the implementation of these tests within the R system for statistical computing, which is based on the interaction of the R packages mirt, psychotools and strucchange. Third, we illustrate the application of this software and the interpretation of its output in two empirical datasets. The complete R code for reproducing our results is reported in the paper.
#Psychometrics#IRT
Public
Jan R. Boehnke

A paper introducing a new IRT approach to estimate meaningful thresholds to accurately interpret questionnaire scores and facilitate clinical decision making:

In this approach an anchor item indicating the criterion state of interest is added to #IRT model estimation. In simulation studies the method perfectly recovered threshold values on the latent trait with practically no bias and high precision:
link.springer.com/article/10.1

SpringerLinkEstimating meaningful thresholds for multi-item questionnaires using item response theory - Quality of Life ResearchPurpose Meaningful thresholds are needed to interpret patient-reported outcome measure (PROM) results. This paper introduces a new method, based on item response theory (IRT), to estimate such thresholds. The performance of the method is examined in simulated datasets and two real datasets, and compared with other methods. Methods The IRT method involves fitting an IRT model to the PROM items and an anchor item indicating the criterion state of interest. The difficulty parameter of the anchor item represents the meaningful threshold on the latent trait. The latent threshold is then linked to the corresponding expected PROM score. We simulated 4500 item response datasets to a 10-item PROM, and an anchor item. The datasets varied with respect to the mean and standard deviation of the latent trait, and the reliability of the anchor item. The real datasets consisted of a depression scale with a clinical depression diagnosis as anchor variable and a pain scale with a patient acceptable symptom state (PASS) question as anchor variable. Results The new IRT method recovered the true thresholds accurately across the simulated datasets. The other methods, except one, produced biased threshold estimates if the state prevalence was smaller or greater than 0.5. The adjusted predictive modeling method matched the new IRT method (also in the real datasets) but showed some residual bias if the prevalence was smaller than 0.3 or greater than 0.7. Conclusions The new IRT method perfectly recovers meaningful (interpretational) thresholds for multi-item questionnaires, provided that the data satisfy the assumptions for IRT analysis.
#Psychometrics#HRQL
Public *
Ståle Askerød Johansen

#introduction

#hello people. Ståle from Norway. I've been doing tactical and strategic #infosec and #irt in #HigherED for the last seven years. It all started with a bunch of diskettes and c.o.l.a. in 1993, and since then I've worked as a sysadmin. Mostly unix-es, but also Windows. This includes project management, #monitoring, #architecture, designing an #operations center and touching a bunch of technologies over the years. I still code a little #shell and #python. Been using #cfengine and #tivoli with a smile.

A memorable moment still is opening 7 xterms and compiling X11R6 for #sunos #solaris #hp-ux #ultrix #irix #linux #digitalunix and managing the configuration and security of tons of servers and clients centrally. This must have been 2000 or so.

These days I tend to like logging and #siem frameworks like #elk, teaching users and management how to make smart choices, general config management and hardening, IAM-stuff and the essential symbiosis between #sysadmin stuff and infosec stuff. #isms. #policies. #architecture.

I also like #photography #lego #rpg #larp #cooking #politics #society #emacs #languages #puns. A lot nicer than the picture. He/Him.

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