"The ability to use statistics is essential for anyone wishing to analyse data from language. Language teaching practitioners are increasingly being asked to assess their students' language ability. This book, written by one of the leading figures in the field of language assessment, deals with the complexity of statistical analysis in an accessible and comprehensive manner."--Jacket.

1.Basic concepts and terms -- 2. Describing test scores -- 3. Investigating relationships among different sets of test scores -- 4. Analyzing test tasks -- 5. Investigating reliability for norm-referenced tests -- 6. Investigating reliability for criterion-referenced tests -- 7. Stating hypotheses and making statistical inferences -- 8. Tests of statistical significance -- 9. Investigating validity -- 10. Reporting and interpreting test scores.