Acknowledgements Introduction 1 Diagnosing foreign language proficiency: a teaching/testing interface 2 Diagnosis in other fields 3 Introduction to DIALANG 4 The history of DIALANG 5 Piloting in DIALANG 6 Setting standards 7 The Vocabulary Size Placement Test 8 The role of self-assessmentin DIALANG 9 Reading 10 Listening 11 Writing 12 Grammar 13 Vocabulary 14 The value of feedback and advice 15 Experimental Items 16 Experiments in the use of self-assessment 17 The future of diagnostic testing References Index