1. Herrnstein’s equation for the rates of responding during concurrent schedules

   • Frances K. McSweeney
   • Cam L. Melville
   • J. E. Whipple

   OriginalPaper Pages: 275 - 289

2. Second-order conditioning using a contextual stimulus as S₁

   • Nancy A. Marlin

   OriginalPaper Pages: 290 - 294

3. Are “no-drug” cues discriminated during drug-discrimination training?

   • Donald A. Overton
   • Dennis A. Merkle
   • Mark L. Hayes

   OriginalPaper Pages: 295 - 301

4. Tests of two explanations of response elimination by noncontingent reinforcement

   • H. M. Jenkins
   • W. A. Lambos

   OriginalPaper Pages: 302 - 308

5. Rats’ responses to a moving object related to food or water: A behavior-systems analysis

   • William Timberlake

   OriginalPaper Pages: 309 - 320

6. Effects of environmental novelty on filial behavior in imprinted ducklings

   • Leonard A. Eiserer

   OriginalPaper Pages: 321 - 324

7. The role of oral and postingestional cues in the conditioning of taste preferences based on differing caloric density and caloric outcome in weanling and mature rats

   • Linda Hayward

   OriginalPaper Pages: 325 - 331

8. Conspecific individual recognition between starlings after toxicant-induced sickness

   • J. Russell Mason
   • Russell F. Reidinger

   OriginalPaper Pages: 332 - 336

9. The partial-reinforcement extinction effect in 4–5-day-old guinea pigs

   • William A. Dailey
   • Mark Lindner
   • Abram Amsel

   OriginalPaper Pages: 337 - 340

10. Matching and oddity conditional discrimination in the goldfish as avoidance responses: Evidence for conceptual avoidance learning

    • D. J. Zerbolio
    • Joel L. Royalty

    OriginalPaper Pages: 341 - 348

11. “Same/different” symbol use by pigeons

    • Charles A. Edwards
    • Joyce A. Jagielo
    • Thomas R. Zentall

    OriginalPaper Pages: 349 - 355

12. Effects of proactive interference on rats’ continuous nonmatching-to-sample performance

    • Michael J. Pontecorvo

    OriginalPaper Pages: 356 - 366

13. Feature-negative effect in rats’ discrimination learning in the runway

    • Steven J. Haggbloom

    OriginalPaper Pages: 367 - 372

14. The influence of cue type and configuration upon radial-maze performance in the rat

    • Philipp J. Kraemer
    • Mary E. Gilbert
    • Nancy K. Innis

    OriginalPaper Pages: 373 - 380

15. Notice

    Announcement Pages: 381 - 381