Japanese Journal of Animal Psychology

The effects of fixed sequence of US intensities and CS-US correlation on licking suppression in rats

Nobutaka DOE

2000 Volume 50 Issue 2 Pages 213-220
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.213

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Two experiments investigated the effects of shock (US) sequence and correlation between signals (CSs) and shocks (USs) on contextual fear with conditioned licking suppression preparation. In both experiments, three shocks of differentintensities were presented in fixed or random order. These shocks were correlated or uncorrelated with three different tones in Experiment 1, and with light, tone, and white noise in Experiment 2. In Experiment 1, the basal licking behavior was more suppressed in the groups with random shock sequence than in the groups with fixed shock sequence, regardless of combination of signals with shocks. Whereas in Experiment 2, the basal licking suppression was greater when signals and shocks were uncorrelated than when they were correlated, regardless of shock sequence. These results suggest that the factor to attenuate contextual fear assessed by licking suppression varies depending on the degree of distinctiveness among signals.

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Selective cues of sequential stimuli in conditional matching-to-sample task by pigeons

Hiromichi KUNO, Kei MATSUMOTO, Makiko HASEBE, Takashige IWAMOTO

2000 Volume 50 Issue 2 Pages 221-229
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.221

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With a conditional matching-to-sample task including selective sample cue of sequential color stimuli, 9 pigeons were trained to respond to the left / right key corresponding to the sample cue. Experiments were conducted for three groups of pigeons. The temporal location of the sample cue in sequential stimuli was varied across the groups. Pigeons of the Group F were trained with the task, in which the first stimulus of the sequential stimuli was the cue for their correct responses. Pigeons of Group C were trained with the task, in which the second stimulus of the sequential stimuli was the cue for their correct responses. Pigeons of Group E were trained with the task, in which the third (end) stimulus of the sequential stimuli was the cue for their correct responses. The best performance was obtained in the Group E, with the average performance in Group F. In contrast, Group C did not show such a good performance. These results suggest that pigeons can selectively use a sample cue of the sequential stimuli based on its temporal location and that it is difficult for pigeons to use the middle sample cue of sequential stimuli.

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Animal psychology in the LXth Annual Convention : Back to the future

Shigehisa SEKIGUCHI

2000 Volume 50 Issue 2 Pages 231-238
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.231

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Aggression embedded in the structures of behavior : Intermale aggression in mice and rats

Katsunori KATO

2000 Volume 50 Issue 2 Pages 239-246
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.239

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On the aggression of primates

Koshi NORIKOSHI

2000 Volume 50 Issue 2 Pages 247-254
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.247

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Aggression of preschool children

Takamasa KOYAMA

2000 Volume 50 Issue 2 Pages 255-259
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.255

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The meaning of animal study in psychology

Yutaka HARUKI

2000 Volume 50 Issue 2 Pages 261-264
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.261

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[title in Japanese]

2000 Volume 50 Issue 2 Pages 271-315
Published: December 25, 2000
Released on J-STAGE: October 13, 2009

DOIhttps://doi.org/10.2502/janip.50.271

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