. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. A+X TRIAL el 1*2 3*4 5 6* 1, el e3 e6 B. 2ioo - O OO 90 - 2 PJ SI CHI OVERSHADOW $ZZ% NOVEL flB BLOCK 70 -. Response to X el Response to A p'igure 2. Summary of acquisition and extinction testing in a block- ing experiment. IA) Subjects in groups NOVEL and BLOCK were con- ditioned to a novel odorant or to odorant A. respectively, as in Figure IB. except six forward-pairing acquisition trials were used in the pre- training phase. All groups received six trials with the A + A mixture in the blocking phase. Geraniol and 1-hexan
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. A+X TRIAL el 1*2 3*4 5 6* 1, el e3 e6 B. 2ioo - O OO 90 - 2 PJ SI CHI OVERSHADOW $ZZ% NOVEL flB BLOCK 70 -. Response to X el Response to A p'igure 2. Summary of acquisition and extinction testing in a block- ing experiment. IA) Subjects in groups NOVEL and BLOCK were con- ditioned to a novel odorant or to odorant A. respectively, as in Figure IB. except six forward-pairing acquisition trials were used in the pre- training phase. All groups received six trials with the A + A mixture in the blocking phase. Geraniol and 1-hexanol were counterbalanced as .1 and A. and 2-octanone was used as the novel pretraining odorant. Eighteen subjects were selected and randomly assigned to each group. In order to assess responses to odorant A. all subjects received extinc- tion trials with odorant A'after the first, third (e3), and sixth (e6) trials in the blocki ng phase. I n addition, after all extinction testing was complete subjects received a final extinction trial with odorant A to determine whether differences in responding to A" might be due to a more general mechanism ( low motivational states) than to blocking. ( mol-1 ' sucrose was used for reinforcement throughout the experi- ment.) (B) The emergence of a blocking effect throughout the course of the blocking phase. Response probabilities to odorant A" in groups OVERSHADOW. NOVEL, and BLOCK are shown at el, e3. and e6. The response probability of group BLOCK is significantly lower that those of groups NOVEL and OVERSHADOW at e6 (x2 = P < ) but not at el (x: = , NS)orate3(x: = NS). One-trial blocking—that is. a significant difference among groups at el —occurs under other conditions of reinforcement (Smith, in prep.). Groups do not differ in response probabilities to odorant A (x2 = NS).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for rea
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
