The Psychology of Learning and Motivation publishes empirical and theoretical contributions in cognitive and experimental psychology, ranging from classical and instrumental conditioning to complex learning and problem solving. Each chapter provides a thoughtful integration of a body of work.M. Bassok, Object-Based Reasoning: Introduction. Separation and Contrast Between Content and Structure. Semantic Knowledge Determines how People Represent Problems. Semantic Knowledge Affects Selection of Processing Strategies. Discussion. References. R.L. Klatzky, J.M. Loomis, and R.G. Golledge, Encoding Spatial Representations Through Nonvisually Guided Locomotion: Tests of Human Path Integration: Navigational Concepts. General Assumptions and Findings Regarding Human Navigation. Representations and Processes Underlying Short Cuts in Space. The Encoding-Error Model of Path Completion. General Methodology of Reported Experiments. Encoding as Inferred from Reproduction and Verbal Report of Simple Paths. Encoding Distances and Turns Inferred from Fitting the Encoding-Error Model. Effects of Experiences on Encoding Pathway Parameters. When Does Updating of the Homing Vector Occur? Evidence Against Moment-to-Moment Updating. Group and Individual Differences in Navigation without Vision. General Summary and Conclusions. References. M.A. Gernsbacher, Attenuating Interference During Comprehension: The Role of Suppression: Introduction. Attenuating Interference during Lexical Access. Attenuating Interference during Anaphoric Reference. Attenuating Interference during Cataphoric Reference. Attenuating Interference during Syntal&