Focusing on the status, progress, instrumentation, and applications of studies on the nature of speech, this report contains the following research studies: "The Role of Psychophysics in Understanding Speech Perception" (B. H. Repp); "Specialized Perceiving Systems for Speech and Other Biologically Significant Sounds" (I. G. Mattingly; A. M. Liberman); "'Voicing' in English: A Catalog of Acoustic Features Signaling /b/ versus /p/ in Trochees" (L. Lisker); "Categorical Tendencies in Imitating Self-Produced Isolated Vowels" (B. H. Repp; D. R. Williams); "An Acoustic Analysis of V-to-C and V-to-V: Coarticulatory Effects in Catalan and Spanish VCV Sequences" (D. Recasens); "The Sound of Two Hands Clapping: An Exploratory Study" (B. H. Repp); "An Aeroacoustics Approach to Phonation; Some Experimental and Theoretical Observations" (R. S. McGowan); "Pattern Formation in Speech and Limb Movements Involving Many Degrees of Freedom" (J. A. S. Kelso); "The Space-Time Behavior of Single and Bimanual Rhythmical Movements: Data and Model" (B. A. Kay and others); "Language Mechanisms and Reading Disorder: A Modular Approach" (D. Shankweiler; S. Crain); "Syntactic Complexity and Reading Acquisition" (S. Crain; D. Shankweiler); "Phonological Coding in Word Reading: Evidence from Hearing and Deaf Readers" (V. L. Hanson; C. A. Fowler); "Strategies for Visual Word Recognition and Orthographic Depth: A Multi-Lingual Comparison (R. Frost and others); "The Inflected Noun System in Serbo-Croatian: Lexical Representation of Morphological Structure" (L. B. Feldman; C. A. Fowler); and"Repetition Priming Is Not Purely Episodic in Origin" (L. B. Feldman; J. Moskovljevic). Also included is a list of publications and an appendix listing these Status Reports by report number and providing DTIC and ERIC numbers. (JD)