|
World Leader in Rasch Analysis
and Rasch Measurement Software
Probabilistic Measurement Models
Dichotomous Analysis - Rasch - 30,000 items by 10,000,000 persons
Rating Scale Analysis & Extended Logistic Model - Andrich - up to 255 categories
Partial Credit Analysis - Masters - up to 255 categories per item
Psychometric and Educational test development
IRT Item Response Theory One Parameter Logistic Model 1PL 1-PL - Lord & Birnbaum
Polytomous - Polychotomous - Analysis - Andersen; Sequential Rasch Models - Glas etc.
Rasch Measurement & Fit Analysis - Wright; Many-facet Rasch Measurement - Linacre
Statistical Adjacent Logit, Transition Odds and Continuation Ratio Models
Item bias, DIF and DPF Analysis, Summary Statistics; Stochastic Guttman Biorder Analysis
Rasch Analysis Training Workshops; and more ...
The Netflix Challenge has finished. "The Ensemble" team (of which Mike is a member) topped the Quiz leaderboard, but was adjudicated (correctly) to have finished second on the decisive Test leaderboard. This is a big disappointment to Robbie, the wallaby (kangaroo) joey! But the "Lanterne Rouge" team (of which Mike is the leading member) achieved its objective of obtaining the very worst Quiz and Test RMSEs out of the 44,014 submissions made by 5,169 teams. Mike remarked: "After 34 months of hard work, Lanterne Rouge has achieved these dubious honors (sic, Netflix). We are smiling through the tears!" |
