Zum Einfluss der Trainingsmethode auf das Lernverhalten von Zwergziegen am Computer

Franz, Hartmut

doi:10.5194/aab-44-553-2001

Cited by 2 publications

(2 citation statements)

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“…This periodically repeated pseudo-random series included 32 consecutive offers of 20 different positions of the four stimuli. In order to avoid a non-intended choice of a position instead of the choice of a particular stimulus the same position of the S+ stimulus in more than two successive offers was prevented (FRANZ, 2001). During conditioning, monitoring took place to establish whether all sectors (positions) were distributed equally among each animal's choices as the random program demands.…”

Section: Learning Proceduresmentioning

confidence: 99%

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Visual discrimination learning of group-housed goats at an automated learning device

et al. 2002

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Abstract. A general purpose computer system for behavioral conditioning experiments, the "Fields-Monitor", was developed and has been in use for several years. The set-up allows flexible stimulus presentations and rewards for different kinds of learning behavior in animals. It enables training and testing of animals even under group housing conditions which prevent the social isolation and possible distorting influences resulting from the experimenter or from the time of the day (the test animals visit the learning device whenever they want). Thus, it eliminates most of the stress factors known to decrease learning success. Using this device, 160 dwarf goats were trained for visual discrimination of four stimulus patterns (simple geometric figures, Roman letters) presented simultaneously. One of these patterns was rewarded with a small portion of water after each correct choice. A comparison of mean learning curves in the three consecutive tests showed that in the second and third test successful learning started earlier and reached a higher level (70–80% correct choices as early as the 5–6th Test Day) than in Test 1 (about 60% correct choices at the 10th Test Day). The coefficient of variation of average learning success for 10 days was 28.4, 18.7, 16.8 % in Test 1–3 respectively, indicating great differences between the animals. All animals could use the learning equipment voluntarily over several weeks, without any social deprivation.

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Section: Learning Proceduresmentioning

confidence: 99%

“…As soon as a test animal exhibited 40% correct choices in a series of 14 actuations, the basic subroutine, encompassing all 20 dispositions of stimuli, was re-entered. See FRANZ (2001) for further details of these subroutines. Each actuation of a switch triggered data collection.…”

Section: Learning Proceduresmentioning

confidence: 99%

Visual discrimination learning of group-housed goats at an automated learning device

et al. 2002

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Oddity learning by African dwarf goats ( Capra hircus )

Roitberg¹,

Franz²

2004

Animal Cognition

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Seventeen African dwarf goats (adult females) were trained on oddity tasks using an automated learning device. One odd stimulus and three identical nonodd stimuli were presented on a screen divided into four sectors; the sector for the odd stimulus was varied pseudorandomly. Responses to the odd stimulus were deemed to be correct and were reinforced with food. In phase 1, the goats were trained on eight stimulus configurations. From trial to trial the odd discriminandum was either a + symbol or the letter S, and the nonodd discriminandum was the symbol not used as the odd one. In phase 2, the animals were similarly trained using an unfilled triangle or a filled (i.e., solid black) circle. In phase 3, three new discriminanda were used, an unfilled, small circle with radiating lines, an unfilled heart-shaped symbol, and an unfilled oval; which of the three discriminanda was odd and nonodd was varied from trial to trial. Following these training phases, a transfer test was given, which involved 24 new discriminanda sets. These were presented twice for a total of 48 transfer test trials. Results early in training showed approximately 25% correct, which might be expected by chance in a four-choice task. After 500-2,000 trials, results improved to approximately 40-44% correct. The best-performing subject reached 60-80% correct during training. On the transfer test, this subject had 47.9% correct and that significantly exceeded 25% expected by chance. This finding suggests that some exceptional individuals of African dwarf goats are capable of learning the oddity concept.

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Zum Einfluss der Trainingsmethode auf das Lernverhalten von Zwergziegen am Computer

Cited by 2 publications

References 3 publications

Visual discrimination learning of group-housed goats at an automated learning device

Visual discrimination learning of group-housed goats at an automated learning device

Oddity learning by African dwarf goats ( Capra hircus )

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