Investigating the relationship between item exposure and test overlap: item sharing and item pooling.
Br J Math Stat Psychol
; 63(Pt 1): 205-26, 2010 Feb.
Article
em En
| MEDLINE
| ID: mdl-19545484
ABSTRACT
To date, exposure control procedures that are designed to control item exposure and test overlap simultaneously are based on the assumption of item sharing between pairs of examinees. However, examinees may obtain test information from more than one examinee in practice. This larger scope of information sharing needs to be taken into account in refining exposure control procedures. To control item exposure and test overlap among a group of examinees larger than two, the relationship between the two indices needs to be identified first. The purpose of this paper is to analytically derive the relationships between item exposure rate and each of the two forms of test overlap, item sharing and item pooling, for fixed-length computerized adaptive tests. Item sharing is defined as the number of common items shared by all examinees in a group, while item pooling is the number of overlapping items that an examinee has with a group of examinees. The accuracy of the derived relationships was verified using numerical examples. The relationships derived will lay the foundation for future development of procedures to simultaneously control item exposure and item sharing or item pooling among a group of examinees larger than two.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Psicometria
/
Adaptação Psicológica
/
Modelos Estatísticos
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Br J Math Stat Psychol
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
China