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Idiothetic
Idiothetic literally means "self-proposition" (Greek derivation), and is used in navigation models (e.g., of a rat in a maze) to describe the use of self-motion cues, rather than allothetic, or external, cues such as landmarks, to determine position and movement. The word is sometimes also spelled "ideothetic" (e.g., Chen et al, 1994 ). Idiothetic cues include vestibular, optic flow and proprioception. Idiothetic cues are important for the type of navigation known as path integrationMittelstaedt, H. and Mittelstaedt, M.-L. (1973). "Mechanismen der orientierung ohne richtende aussenreize." Fortschr. Zool. 21:46–58. in which subjects navigate purely using such self-motion cues. This is achieved by an animal through the signals generated by angular and linear accelerations in the course of its exploration. These information generate and update a vector towards the starting point and an accurate path for return. The term ''idiothetic'' is also used in robotics and in personality p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allothetic
Allothetic means being centred in people or places other than oneself. It has been defined as a process of "determining and maintaining a course or trajectory from one place to another. It can be used as a navigational strategy among animals to aid in their survival. It can also be a source of information for machines, particularly those biologically-inspired models and is provided by a set of laser rangefinders, sonars, or vision. Allothetic is used in navigation models (e.g., of a rat in a maze) as in the phrase "allothetic map" to indicate that a global map, not orientated or centred on the subject was used, rather than idiothetic, which means a navigation system centred on the subject. Directional information may be sourced from familiar reference points such as the sun, stars, or the Earth's magnetic field. Allothetic cues are often employed with idiothetic information to achieve spatial behavior. Their characteristics are complementary such as the way the latter can help ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |