1. Acknowledgements

   Announcement Pages: vi - vi

2. Editorial

   • Abram Amsel

   EditorialNotes Pages: 1 - 2

3. Saccharin aversions induced by lithium chloride toxicosis in a backward conditioning paradigm

   • Fred J. Boland

   OriginalPaper Pages: 3 - 4

4. US-alone presentations as an extinction procedure

   • John J. B. Ayres
   • James O. Benedict

   OriginalPaper Pages: 5 - 8

5. Acquisition and extinction in the presence of the same intertrial stimuli: The effects of partial reward

   • D. R. Ziff
   • R. A. Dickerman
   • K. A. Lowery

   OriginalPaper Pages: 9 - 12

6. Frequency, duration, and speed of wheel running of rats as a function of age and starvation

   • Leonard F. Jakubczak

   OriginalPaper Pages: 13 - 16

7. The response-shock interval and conditioned suppression of avoidance in rats

   • Stanley R. Scobie

   OriginalPaper Pages: 17 - 20

8. Go-no go avoidance discriminations in rats with simple “go” and compound “no go” signals: Stimulus modality and stimulus intensity

   • Marina Frontali
   • Giorgio Bignami

   OriginalPaper Pages: 21 - 24

9. Further experiments on probability learning in goldfish

   • William T. Woodard
   • M. E. Bitterman

   OriginalPaper Pages: 25 - 28

10. Extraneous information in delayed pattern reproduction by monkeys

    • Mary L. Borkhuis

    OriginalPaper Pages: 29 - 32

11. Visual discrimination learning of random figure problems by rhesus monkeys

    • Kristin R. Carlson

    OriginalPaper Pages: 33 - 37

12. Control of responding by a conditioned reinforcer in the presence of free food

    • L. A. Alferink
    • E. K. Crossman
    • C. D. Cheney

    OriginalPaper Pages: 38 - 40

13. Drug effects and avoidance-extinction in rats: A test of the drug novelty hypothesis using ethanol

    • Zalman Amit
    • D. Ziskind
    • Morrie Baum

    OriginalPaper Pages: 41 - 43

14. Acquisition and maintenance of Sidman avoidance with paired rat subjects

    • William L. Cunningham
    • Albert E. Roberts

    OriginalPaper Pages: 44 - 48

15. Posttrial REM sleep: A critical period for consolidation of shuttlebox avoidance

    • Chester A. Pearlman
    • Ramon Greenberg

    OriginalPaper Pages: 49 - 51

16. Pretraining and discrimination reversal learning by rhesus monkeys

    • J. M. Warren
    • Helen B. Warren

    OriginalPaper Pages: 52 - 56

17. Intermittent reinforcement and salt arousal of thirst in rats

    • Stanley R. Scobie
    • Craig Jensen

    OriginalPaper Pages: 57 - 59

18. Generalization along the dimension of sound intensity in pigeons

    • Charles Lawrence

    OriginalPaper Pages: 60 - 64

19. The effect of overtraining on a visual discrimination on transfer to a spatial discrimination

    • T. Gary Waller

    OriginalPaper Pages: 65 - 67

20. The role of reinforcement and nonreinforcement in an operant frustration effect

    • Larry F. Hughes
    • Lawrence Dachowski

    OriginalPaper Pages: 68 - 72

21. Scaling the duration of short pauses in licking behavior of rats and mice: A first approximation to a basic pause-scaling unit

    • W. Clem Small
    • Linda Lillard

    OriginalPaper Pages: 73 - 76

22. The effect of sodium pentobarbital on attraction in the albino rat

    • Lee A. Becker
    • Dennis C. Wright
    • Bruce Lammers

    OriginalPaper Pages: 77 - 80