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The Shetland Pony is a very small, robust breed of pony. Shetlands range in size from about 710 to 1070 mm, with an official maximum height at the withers (1200 mm for American Shetlands). Shetland Ponies have heavy coats and short legs, and are considered quite intelligent. They are a very strong breed, used for riding, driving, and pack purposes.
The relationship is not linear, however. Generally, small mammals have relatively larger brains than big ones. Mice have a direct brain/body size ratio similar to humans (1/40), while elephants have a comparatively small brain/body size (1/560), despite being quite intelligent animals. [18] Treeshrews have a brain/body mass ratio of (1/10). [19]
The mind and behavior of non-human animals has captivated the human imagination for centuries. Many writers, such as Descartes, have speculated about the presence or absence of the animal mind. [7] These speculations led to many observations of animal behavior before modern science and testing were available.
Social learning refers to learning that is facilitated by observation of, or interaction with, another animal or its products. [1] Social learning has been observed in a variety of animal taxa , [ 2 ] [ 3 ] such as insects , [ 4 ] fish , [ 5 ] birds , [ 6 ] reptiles , amphibians [ 7 ] and mammals (including primates [ 8 ] ).
The Shetland is a small, wool-producing breed of sheep originating in the Shetland Isles, Scotland, but is now also kept in many other parts of the world. It is part of the Northern European short-tailed sheep group, and it is closely related to the extinct Scottish Dunface .
The Shetland Pony Stud-Book Society is the breed society for the traditional Shetland throughout the world. [7] It was started in 1890 to maintain purity and encourage high-quality animals. [citation needed] In 1957, the Shetland Islands Premium Stallion Scheme was formed to subsidise high-quality registered stallions to improve the breeding stock.
Dickinson's research focuses on learning, memory, motivation, and future planning in both humans and other animals, [2] [3] [7] and has influenced "incentive" theories of motivation and addiction. [8] His recent work includes theories of actions and habits, [7] [9] [10] drug addiction, [11] and hedonic pleasure. [12]
Recently, most non-human theory of mind research has focused on monkeys and great apes, who are of most interest in the study of the evolution of human social cognition. Research can be categorized in to three subsections of theory of mind: attribution of intentions, attribution of knowledge (and perception), and attribution of belief.