J. Charles Alderson is Emeritus Professor of Linguistics and English Language Education at Lancaster University. Eeva-Leena Haapakangas is Research Assistant in the DIALUKI project at the Centre for Applied Language Studies at the University of Jyväskylä.Ari Huhta is Professor of Language Assessment at the Centre for Applied Language Studies, University of Jyväskylä.Lea Nieminen is a Postdoctoral Researcher at the Centre for Applied Language Studies at the University of Jyväskylä.Riikka Ullakonoja is a Postdoctoral Researcher at the Centre for Applied Language Studies at the University of Jyväskylä.

• 1. Introduction 2. Towards a theory of diagnosis 3.Research into the diagnosis of second and foreign language proficiency 4. The role of feedback in diagnosis 5.The construct of reading in a second or foreign language 6. How second and foreign language reading has been operationalised 7. The linguistic basis of reading in a second and foreign language 8. The cognitive basis of reading in a second and foreign language 9. The motivational basis of reading in a second and foreign language 10. Diagnosis from the perspective of the language classroom 11: Diagnosing second and foreign language reading: Bringing it all together 12. Implications for intervention and treatment Appendices: Diagnostic research instruments used in various studies

J. Charles Alderson is Emeritus Professor of Linguistics and English Language Education at Lancaster University. Eeva-Leena Haapakangas is Research Assistant in the DIALUKI project at the Centre for Applied Language Studies at the University of Jyväskylä.Ari Huhta is Professor of Language Assessment at the Centre for Applied Language Studies, University of Jyväskylä.Lea Nieminen is a Postdoctoral Researcher at the Centre for Applied Language Studies at the University of Jyväskylä.Riikka Ullakonoja is a Postdoctoral Researcher at the Centre for Applied Language Studies at the University of Jyväskylä.

• 1. Introduction 2. Towards a theory of diagnosis 3.Research into the diagnosis of second and foreign language proficiency 4. The role of feedback in diagnosis 5.The construct of reading in a second or foreign language 6. How second and foreign language reading has been operationalised 7. The linguistic basis of reading in a second and foreign language 8. The cognitive basis of reading in a second and foreign language 9. The motivational basis of reading in a second and foreign language 10. Diagnosis from the perspective of the language classroom 11: Diagnosing second and foreign language reading: Bringing it all together 12. Implications for intervention and treatment Appendices: Diagnostic research instruments used in various studies

J. Charles Alderson is Emeritus Professor of Linguistics and English Language Education at Lancaster University. Eeva-Leena Haapakangas is Research Assistant in the DIALUKI project at the Centre for Applied Language Studies at the University of Jyväskylä.Ari Huhta is Professor of Language Assessment at the Centre for Applied Language Studies, University of Jyväskylä.Lea Nieminen is a Postdoctoral Researcher at the Centre for Applied Language Studies at the University of Jyväskylä.Riikka Ullakonoja is a Postdoctoral Researcher at the Centre for Applied Language Studies at the University of Jyväskylä.

• 1. Introduction 2. Towards a theory of diagnosis 3.Research into the diagnosis of second and foreign language proficiency 4. The role of feedback in diagnosis 5.The construct of reading in a second or foreign language 6. How second and foreign language reading has been operationalised 7. The linguistic basis of reading in a second and foreign language 8. The cognitive basis of reading in a second and foreign language 9. The motivational basis of reading in a second and foreign language 10. Diagnosis from the perspective of the language classroom 11: Diagnosing second and foreign language reading: Bringing it all together 12. Implications for intervention and treatment Appendices: Diagnostic research instruments used in various studies