1. Introduction
2. Blocking Effects of A-bar Interveners
3. A Referentiality-Based Account of Blocking Effects of Wh-Phrase Interveners
4. Gradience in the Strength of Long-Distance Wh-dependencies
5. Fronted Wh-phrases and their Interaction with A-bar Interveners
6. Remarks on Adjunct Wh-phrase Extraction
References