1. Conditioned and unconditioned stress-induced analgesia: Stimulus preexposure and stimulus change

   • Steven F. Maier
   • Linda R. Watkins

   OriginalPaper Pages: 295 - 304

2. Testing optimal foraging theory on the radial maze: The role of learning in patch sampling

   • William A. Roberts

   OriginalPaper Pages: 305 - 316

3. Extinction of operant behavior: An analysis based on foraging considerations

   • Roger L. Mellgren
   • Timothy F. Elsmore

   OriginalPaper Pages: 317 - 325

4. Negative discriminative stimuli provide information about the identity of omitted response-contingent outcomes

   • Ruth M. Colwill

   OriginalPaper Pages: 326 - 336

5. Behavioral contrast and reinforcement value

   • Ben A. Williams

   OriginalPaper Pages: 337 - 344

6. Extinction of sequential conditioned inhibition

   • Michael J. Detke

   OriginalPaper Pages: 345 - 354

7. Combinations of modulators trained with the same and different target stimuli

   • Robert A. Rescorla

   OriginalPaper Pages: 355 - 360

8. Food deprivation and conditioned flavor preferences based on sweetened and unsweetened foods

   • Elizabeth D. Capaldi
   • Joan Sheffer
   • Jacqueline Owens

   OriginalPaper Pages: 361 - 368

9. Periodic water, interwater interval, and adjunctive behavior in a 24-hour multiresponse environment

   • William Timberlake
   • Gary A. Lucas

   OriginalPaper Pages: 369 - 380

10. Learning in honeybees as a function of amount of reward: Rejection of the equal-asymptote assumption

    • P. A. Couvillon
    • Younglim Lee
    • M. E. Bitterman

    OriginalPaper Pages: 381 - 387

11. Notices and announcements

    Announcement Pages: 388 - 388