Showing 1 - 2 of 2 Research Library Publications

Quantifying the Bias of Non-linear Equating and Score Transformations

Posted: | Matthias von Davier, Brian Clauser

Essays on Contemporary Psychometrics: Pages 163-180

 

This paper shows that using non-linear functions for equating and score transformations leads to consequences that are not commensurable with classical test theory (CTT). More specifically, a well-known theorem from calculus shows that the expected value of a non-linearly transformed variable does not equal the transformed expected value of this variable.

Category:Assessment-Oriented Research, Scoring

ALS Specific Quality of Life Short Form (ALSSQOL-SF): A Brief, Reliable and Valid Version of the ALSSQOL-R

Posted: | S. H. Felgoise, R. A. Feinberg, H. B. Stephens, P. Barkhaus, K. Boylan, J. Caress, Z. Simmons

Muscle Nerve, 58: 646-654

 

The Amyotrophic Lateral Sclerosis (ALS)‐Specific Quality of Life instrument and its revised version (ALSSQOL and ALSSQOL‐R) have strong psychometric properties, and have demonstrated research and clinical utility. This study aimed to develop a short form (ALSSQOL‐SF) suitable for limited clinic time and patient stamina.

Category:Assessment-Oriented Research, General Measurement, Health Professions