
- This event has passed.
Full Title: | Item Response Theory Modelling in Analysing Rating Scale Data |
Speaker: | Asaduzzaman Khan, PhD |
The University of Queensland and The University of New England, Australia | |
Date/Time: | Tuesday, January 15, 2013, 3:30pm |
Venue: | ISRT Seminar Room |
Rating scales are increasingly used to perform patient assessments through graded responses on ordinal level of measurements. Outcomes measured in rating scales however provide only a rank ordering of scores where differences between scores composing the scale are unequal in terms of what is being measured. Scores from rating scales do not have an underlying number line with an equal interval and are unable to represent a true linear and continuous measurement. As such, they may not be able to comply with many assumptions of parametric statistics, and has the potential to produce invalid statistical inferences. This paper highlights current concerns in using total raw scores in measuring outcomes in clinical settings along with their potential solutions through using Item Response Theory (IRT) modelling. Results from a simulation study and other real life examples are examined to investigate the suitability of using parametric statistics in the rating scale scores (e.g. summative scores) and their IRT transformed scores. The findings support the use of IRT-based scores when using rating scales to measure patient progress, which in turn can help clinical decision making to optimize patient care.
On February 25, 2025, third-year Applied Statistics students visited Gazipur Agricultural University as part of their AST301: Design and Analysis of Experiments II course. The trip provided insights into the practical applications ... [ Read More ]
The ISRT Students’ Club organized a lively and heartwarming Pitha Utshob on January 29, 2025, celebrating the rich tradition of Bengali winter delicacies. The event brought together students, faculty, and ... [ Read More ]
The Institute of Statistical Research and Training (ISRT) hosted its Annual Picnic 2025 at Shohag Polli Resort, located in Chandra, Gazipur, on Wednesday, January 15, 2025. The event was a ... [ Read More ]
ISRT is pleased to announce the successful completion of the 26th batch’s study tour from December 17 to December 23. During this week-long journey, students explored key sites in Rangamati, ... [ Read More ]
The Institute of Statistical Research and Training (ISRT) proudly announces another milestone achievement at the 2025 ISI World Statistics Congress (WSC). The biennial event, to be held in Hague from ... [ Read More ]
Director,
Institute of Statistical Research
and Training (ISRT)
University of Dhaka
Dhaka 1000, Bangladesh