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A hierarchy of evidence, comprising levels of evidence (LOEs), that is, evidence levels (ELs), is a heuristic used to rank the relative strength of results obtained from experimental research, especially medical research. There is broad agreement on the relative strength of large-scale, epidemiological studies.
The following index is provided as an overview of and topical guide to science: Links to articles and redirects to sections of articles which provide information on each topic are listed with a short description of the topic. When there is more than one article with information on a topic, the most relevant is usually listed, and it may be ...
Bloom's taxonomy is a framework for categorizing educational goals, developed by a committee of educators chaired by Benjamin Bloom in 1956. It was first introduced in the publication Taxonomy of Educational Objectives: The Classification of Educational Goals.
The hierarchy of the sciences is a theory formulated [where?] by Auguste Comte in the 19th century. This theory states that science develops over time beginning with the simplest and most general scientific discipline, astronomy , which is the first to reach the "positive stage" (one of three in Comte's law of three stages ).
The two-empire system or superdomain system, proposed by Mayr (1998), with top-level groupings of Prokaryota (or Monera) and Eukaryota. [11] [12] The eocyte hypothesis, proposed by Lake et al. (1984), [13] which posits two domains, Bacteria and Archaea, with Eukaryota included as a subordinate clade branching from Archaea. [14] [13] [15]
Applied science is the use of scientific processes and knowledge as the means to achieve a particularly practical or useful result. This includes a broad range of applied science-related fields, including engineering and medicine. Applied science can also apply formal science, such as statistics and probability theory, as in epidemiology.
Each level in the hierarchy represents an increase in organisational complexity, with each "object" being primarily composed of the previous level's basic unit. [2] The basic principle behind the organisation is the concept of emergence —the properties and functions found at a hierarchical level are not present and irrelevant at the lower levels.
Tracking meets the need for highly gifted students to be with their intellectual peers in order to be appropriately challenged and to view their own abilities more realistically. [27] Tracking can allow students to receive lessons targeted at their ability for each subject separately, attending lessons set at different levels at the same school.