1. Response-contingent sensory change in a causally structured environment

   • Peter H. Glow
   • Anthony H. Wtnefield

   OriginalPaper Pages: 1 - 18

2. Imprinting in older ducklings: Some tests of a reinforcement model

   • Stephen J. Gaioni
   • Howard S. Hoffman
   • Valerie Newby Stratton

   OriginalPaper Pages: 19 - 26

3. The effects of tactile stimulation on imprinting in ducklings after the sensitive period

   • Leonard A. Eiserer

   OriginalPaper Pages: 27 - 29

4. Apparent disinhibition of successive but not of simultaneous negative contrast

   • Bruce R. Lombardi
   • Charles F. Flaherty

   OriginalPaper Pages: 30 - 42

5. The overshadowing of background stimuli by an informative CS in aversive Pavlovian conditioning with rats

   • F. J. Odling-Smee

   OriginalPaper Pages: 43 - 51

6. Erratum to: Acquisition of barpressing in rats following experience with response-independent food

   • K. L. Wheatley
   • R. L. Welker
   • R. C. Miles

   Erratum Pages: 51 - 51

7. Association of conditioned stimuli during serial conditioning by pigeons

   • Edward A. Wasserman
   • Donald L. Carr
   • James D. Deich

   OriginalPaper Pages: 52 - 56

8. Effects of an aversive CS+ and CS− under deprivation upon successive classical appetitive and aversive conditioning

   • Bruce K. Bromage
   • Michael J. Scavio

   OriginalPaper Pages: 57 - 65

9. Microanalysis of variable-interval performance during stimulus compounding

   • M. Catherine Bushnell
   • Stanley J. Weiss

   OriginalPaper Pages: 66 - 71

10. Fading procedure effects on a visual pattern discrimination reversal in the albino rat

    • S. Aronsohn
    • O. Castillo
    • T. Pinto-Hamuy

    OriginalPaper Pages: 72 - 76

11. The sensory basis of spatial memory in the rat

    • Lucia Zoladek
    • William A. Roberts

    OriginalPaper Pages: 77 - 81

12. A behavior field approach to instrumental learning in the rat: II. Training parameters and a stage model of extinction

    • Paul T. P. Wong

    OriginalPaper Pages: 82 - 93

13. Social facilitation of pecking following differential rearing

    • Cathryn P. Brown

    OriginalPaper Pages: 94 - 97

14. Population density and nonaggressive competition

    • Michael Lobb
    • Garvin McCain

    OriginalPaper Pages: 98 - 105

15. Reflex inhibition and reflex elicitation by acoustic stimuli differing in abruptness of onset and peak intensity

    • James R. Ison

    OriginalPaper Pages: 106 - 110

16. Modification of acoustic and nociceptive reflexes in the rat by visual stimulation

    • B. L. Ash
    • T. Parisi
    • J. R. Ison

    OriginalPaper Pages: 111 - 114

17. Editor’s note

    • M. R. D’Amato

    Notes and Comment Pages: 115 - 115

18. Mitchell, Scott, and Mitchell are not supported by their own data

    • John Garcia

    Letter Pages: 116 - 116

19. Comment on paper by Mitchell, Scott, and Mitchell

    • James C. Smith

    Letter Pages: 117 - 118

20. Reply to Mitchell

    • Sam Revusky

    Letter Pages: 119 - 120

21. The psychological vs. the ethological rat: Two views of the poison avoidance behavior of the rat compared

    • Denis Mitchell

    Letter Pages: 121 - 124