"The implications of halo effects and item dependencies for objective measurement" by T F McNamara

Selected Works of Professor Ray Adams AM

Contribution to Book

The implications of halo effects and item dependencies for objective measurement

Objective measurement : theory into practice (2000)

T F McNamara
Ray Adams, ACER

Abstract

Analysis of data from performance-based language tests presents the problem of dealing appropriately with bundles of items that are linked to particular tasks. The authors use recent developments in Rasch modelling which allow analysis of bundles of items (or sets of ratings) to examine the extent of dependence between items and ratings, and they explore the implications of those dependences on the assessments. Data from two performance assessments are used in two studies of this problem.

Keywords

Test items,
Item response theory,
Test theory,
Language tests,
Item analysis,
Interrater reliability,
Rating scales,
Test reliability,
English,
Second language,
Rasch model

Disciplines

Educational Assessment, Evaluation, and Research

Publication Date

2000

Editor

M. Wilson and G. Engelhard

Publisher

Ablex Publishing

ISBN

1567504337

Citation Information

T F McNamara and Ray Adams. "The implications of halo effects and item dependencies for objective measurement" Stamford, ConnObjective measurement : theory into practice Vol. 5 (2000)
Available at: http://works.bepress.com/ray_adams/21/