Cover -- Half Title -- Title Page -- Copyright Page -- Contents -- Preface -- PART I : INTRODUCTION -- 1. Two Leftovers from Volume 3 -- 1.1 Developmental Change -- 1.2 Empirical Constraints on Deduction Models -- 1.3 Plan of This Work -- 2. Some Methodological Issues -- 2.1 Changes in Procedure -- 2.2 A Different "Null Hypothesis" for the Inventory Prediction -- 3. A Deduction Model for Quantifiers -- 3.1 A New Formulation for the Class of Deduction Models -- 3.2 The Language Lq -- 3.3 Some Useful Definitions -- 3.4 Rewrite Rules and Helping Conditions -- 3.5 The Operations o[sub(Lq)] -- 3.6 Derivations in o[sub(Lq)] -- 3.7 Six Remarks about Mq -- PART II: EXPERIMENTAL TEST OF Mq, AND TH E QUESTION O F DEVELOPMENTAL CHANGE -- 4. Experiment 1 : Test of Mq with Adolescent Subjects -- 4.1 Design -- 4.2 Method -- 4.3 Preliminary Analysis of Results -- 4.4 Inventory Analysis -- 4.5 Additivity Analysis -- 4.6 Conclusion from Experiment 1 -- 5. Experiment 2: Test of Mq with Child Subjects -- 5.1 Design -- 5.2 Method -- 5.3 Preliminary Analyses of Results -- 5.4 Inventory Analysis -- 5.5 Additivity Analysis -- 5.6 Conclusions from Experiment 2 -- 6. Experiment 3: Test of the Model with Arguments Based on Time -- 6.1 Design -- 6.2 Method -- 6.3 Preliminary Analyses of Results -- 6.4 Inventory Analysis -- 6.5 Additivity Analysis -- 6.6 Conclusions from Experiment 3 -- 7. Experiment 4: Test of Mt with Child Subjects -- 7.1 Design -- 7.2 Methods -- 7.3 Preliminary Analyses of Results -- 7.4 Inventory Analysis -- 7.5 Additivity Analysis -- 7.6 Conclusions from Experiment 4 -- PART III: EXPLANATORY ADEQUACY OF DEDUCTION MODELS -- 8. Explanatory Adequacy: General Considerations -- 8.1 Conceptual Domains of English -- 8.2 Observational and Descriptive Adequacy -- 8.3 Research Problem and Plan of Attack