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They are called hierarchy theorems because they induce a proper hierarchy on the classes defined by constraining the respective resources. The hierarchy theorems enable one to make quantitative statements about how much more additional time or space is needed in order to increase the number of problems that can be solved.
A strange loop is a hierarchy of levels, each of which is linked to at least one other by some type of relationship. A strange loop hierarchy is "tangled" (Hofstadter refers to this as a "heterarchy"), in that there is no well defined highest or lowest level; moving through the levels, one eventually returns to the starting point, i.e., the original level.
Social psychology utilizes a wide range of specific theories for various kinds of social and cognitive phenomena. Here is a sampling of some of the more influential theories that can be found in this branch of psychology. Attribution theory – is concerned with the ways in which people explain (or attribute) the behaviour of others. The theory ...
The hierarchy was originally conceived by American psychologist Abraham Maslow in 1943. Maslow had a humanistic approach to psychology, and his work put focus on the whole person instead of ...
A square can always also be referred to as a quadrilateral, polygon or shape. In this way, it is a hierarchy. However, consider the set of polygons using this classification. A square can only be a quadrilateral; it can never be a triangle, hexagon, etc. Nested hierarchies are the organizational schemes behind taxonomies and systematic ...
Charles Spearman developed his two-factor theory of intelligence using factor analysis. [1] His research not only led him to develop the concept of the g factor of general intelligence, but also the s factor of specific intellectual abilities. [2]
Hierarchy theory is a means of studying ecological systems in which the relationship between all of the components is of great complexity. Hierarchy theory focuses on levels of organization and issues of scale , with a specific focus on the role of the observer in the definition of the system. [ 1 ]
The American psychologist John B. Carroll (June 5, 1916 – July 1, 2003) made substantial contributions to psychology, psychometrics and educational linguistics. In 1993, Carroll published Human Cognitive Abilities: A Survey of Factor-Analytic Studies , in which he presented 'A Theory of Cognitive Abilities: The Three-Stratum Theory'.