. The Australian zoologist. Zoology; Zoology; Zoology. INSTRUMENTAL LEARNING IN ECHIDNA a 50' 40-. 4 6 8 successive reversals r 10 12 lation of the operanda and securing the reward gradually decreased over later trials, whereas operant and feeding responses increased, suggesting a selective concentration on the latter. The keys were invariably depressed with the forefeet, occasionally supplemented by the action of the hind limbs by walking over the treadles and unsuccessful (unrewarded) responses were often associated with vigorous kicking at the operanda. All subjects were able to adjust to t
. The Australian zoologist. Zoology; Zoology; Zoology. INSTRUMENTAL LEARNING IN ECHIDNA a 50' 40-. 4 6 8 successive reversals r 10 12 lation of the operanda and securing the reward gradually decreased over later trials, whereas operant and feeding responses increased, suggesting a selective concentration on the latter. The keys were invariably depressed with the forefeet, occasionally supplemented by the action of the hind limbs by walking over the treadles and unsuccessful (unrewarded) responses were often associated with vigorous kicking at the operanda. All subjects were able to adjust to the test situations and responded to training. All of the echidnas succeeded in achieving criterion performance and all except one demonstrated learning-set formation. Response-latencies to operant activities, not considered in detail in the present study, generally decreased significantly over successive trials and often also within blocks of trials. Figure 2a, illustrates changes in error-scores, based on percentages of all operant responses in successive reversals. These indicate that the subjects used 137. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Royal Zoological Society of New South Wales; Royal Zoological Society of New South Wales. Proceedings. [Sydney, Royal Zoological Society of New South Wales]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1914
