Rasch Meta-Metres of Growth for Some Intelligence and Attainment Tests

Measurement and the study of growth.- Probabilistic fundamental measurement and invariance.- The formulation of a meta-metre in which growth is linear.- Estimates of the rate of growth and initial status.- Application of the modified meta-metre to physical growth.- Growth on the Stanford-Binet test of general intelligence,- Growth in reading and mathematics achievement: ECLS-K study.- Growth in reading and mathematics achievement: NLSY study.- Further examples of growth in reading and mathematics achievement.- Decelerating growth and the setting of an early trajectory.- Summary and discussion.

David Andrich first graduated in Mathematics, then in Education, and received a Fulbright Award for study for his PhD in the Measurement, Evaluation and Statistical Analysis Program at The University of Chicago, United States. His dissertation earned the Susan Colver Rosenberger prize for the best research thesis in the Division of the Social Sciences in 1973. He returned to his appointment at The University of Western Australia, and in 1985 was appointed Professor of Education at Murdoch University in Western Australia, where he held the position of Dean for two periods. In 2007, he returned to The University of Western Australia as the Chapple Professor of Education. He is also Visiting Professor in Educational Assessment at The University of Oxford, United Kingdom. He has also been a visiting Professor at The University of Trento in Italy, and visiting Scholar at the University of Copenhagen and The University of Chicago. He has held major research grants from the Australian Research Council continuously since 1985. David has also conducted commissioned research at both national and state levels, and has been a member of expert advisory committees at national and state levels concerned with large-scale assessments. In 1990, he was elected Fellow of the Academy of Social Sciences of Australia for his contributions to measurement in the social sciences. David is especially known for his work in modern test theory, and in particular Rasch measurement theory, where his work has ranged from the philosophy of measurement, through model exposition and interpretation, to software development. He has also given invited addresses at many conferences and has published in Educational, Psychological, Sociological and Statistical journals. 


Ida Marais is a Senior Research Fellow at the GSE Psychometric Laboratory, The University of Western Australia. After graduating with a BSc degree majoring in Computer Science and Psychology, she has worked as a computer