Introduction 1 A Theory of Input Processing: How Learners Work with Input 2 Processing Instruction: Research and Practice in Assessing Primary Effects 3 From Processing Instruction on the Acquisition of Italian Noun-Adjective Agreement to Secondary Transfer-of-Training Effects on Italian Future Tense Verb Morphology 4 From Processing Instruction on the Acquisition of English Past Tense to Secondary Transfer-of-Training Effects on English Third Person Singular Present Tense (with Scott Dean Houghton) 5 From Processing Instruction on the Acquisition of French Imparfait to Secondary Transfer-of-Training Effects on French Subjunctive and to Cumulative Transfer-of-Training Effects with French Causative Constructions (with Cecile Laval) Chapter 6: Final Comments