The preference of rats for free or response-produced food David HothersallDiane HueyKaren Thatcher OriginalPaper Pages: 241 - 243
Experiential factors in the enhancement of saccharin intake after shifts to water Kermit T. HoyengaKatharine Blick Hoyenga OriginalPaper Pages: 244 - 246
Conditioned suppression of a VI baseline using a two-bar multiple VI shock-avoidance schedule Judy Lewis OriginalPaper Pages: 247 - 250
Biphasicity of the time-response curve and amnesic effect of electroconvulsive shock in passive avoidance conditioning Francesco RobustelliAnne GellerMurray E. Jarvik OriginalPaper Pages: 251 - 253
Behavioral components of shock-induced aggression in ground squirrels (Citellus tridecemlineatus) Jim L. TurnerRobert BoicePatrick C. Powers OriginalPaper Pages: 254 - 262
Vocalization as an objective measure of shock-elicited social aggression in rats Donald H. ThorWilliam B. GhiselliLloyd D. Wilson OriginalPaper Pages: 263 - 267
The development of self-reinforcing running in satiated rats Luci PaulFrank Calabrese OriginalPaper Pages: 268 - 272
Effect of number of trials, interstimulus interval, and dishabituation during CS habituation on subsequent conditioning in a CER paradigm Alma E. Lantz OriginalPaper Pages: 273 - 277
Sex differences in rats’ stationary-cage activity measured by observation and automatic recording P. A. Russell OriginalPaper Pages: 278 - 282
Simultaneous and successive contrast with delay of reward N. J. MackintoshJanet Lord OriginalPaper Pages: 283 - 286
Cues for spontaneous alternation by gerbils William N. DemberRudite Kleinman OriginalPaper Pages: 287 - 289
Several factors influencing web-spinning activity in the common house spiderAchaearanea tepidariorum Koch O. J. LienG. J. Fitzgerald OriginalPaper Pages: 290 - 292
Effects of extended fixed-interval training on reversed scallops Harry J. CaplanJohn KarpickeMark Rilling OriginalPaper Pages: 293 - 296
Postdiscrimination generalization as a function of interresponse time K. Geoffrey White OriginalPaper Pages: 297 - 301
Visual reinforcement: Operant acquisition in the presence of a free mirror Ronald BaenningerRochelle A. Mattleman OriginalPaper Pages: 302 - 306
Effects of stimulus alternations on extinguishing a discrimination James H. McCroskeryPatricia M. OlsenJulia Wallace OriginalPaper Pages: 307 - 311
Some behavioral differences between wild and domestic Norway rats: Gnawing and platform jumping Edward O. Price OriginalPaper Pages: 312 - 316
Conditioning in garter snakes: Aversion to palatable prey induced by delayed illness Gordon M. BurghardtHardy C. WilcoxonJames A. Czaplicki OriginalPaper Pages: 317 - 320