The implications of halo effects and item dependencies for objective measurement

T F McNamara; Ray Adams

The implications of halo effects and item dependencies for objective measurement

T F McNamara, Ray Adams

Research output: Chapter in Book/Report/Conference proceeding › Chapter

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.

Original language	English
Title of host publication	Objective measurement : theory into practice
Publication status	Published - 2000
Externally published	Yes

Keywords

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

Disciplines

Educational Assessment, Evaluation, and Research

Cite this

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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.",

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KW - Item analysis

KW - Item response theory

KW - Language tests

KW - Rasch model

KW - Rating scales

KW - Second language

KW - Test items

KW - Test reliability

KW - Test theory

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