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Item Tree Analysis
Item tree analysis (ITA) is a data analytical method which allows constructing a hierarchical structure on the items of a questionnaire or test from observed response patterns. Assume that we have a questionnaire with ''m'' items and that subjects can answer positive (1) or negative (0) to each of these items, i.e. the items are dichotomous. If ''n'' subjects answer the items this results in a binary data matrix ''D'' with ''m'' columns and ''n'' rows. Typical examples of this data format are test items which can be solved (1) or failed (0) by subjects. Other typical examples are questionnaires where the items are statements to which subjects can agree (1) or disagree (0). Depending on the content of the items it is possible that the response of a subject to an item ''j'' determines her or his responses to other items. It is, for example, possible that each subject who agrees to item ''j'' will also agree to item ''i''. In this case we say that item ''j'' implies item ''i'' (short ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Analysis
Data analysis is the process of inspecting, Data cleansing, cleansing, Data transformation, transforming, and Data modeling, modeling data with the goal of discovering useful information, informing conclusions, and supporting decision-making. Data analysis has multiple facets and approaches, encompassing diverse techniques under a variety of names, and is used in different business, science, and social science domains. In today's business world, data analysis plays a role in making decisions more scientific and helping businesses operate more effectively. Data mining is a particular data analysis technique that focuses on statistical modeling and knowledge discovery for predictive rather than purely descriptive purposes, while business intelligence covers data analysis that relies heavily on aggregation, focusing mainly on business information. In statistical applications, data analysis can be divided into descriptive statistics, exploratory data analysis (EDA), and Statistical h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boolean Analysis
Boolean analysis was introduced by Flament (1976).Flament, C. (1976). "L'analyse booleenne de questionnaire", Paris: Mouton. The goal of a Boolean analysis is to detect deterministic dependencies between the items of a questionnaire or similar data-structures in observed response patterns. These deterministic dependencies have the form of logical formulas connecting the items. Assume, for example, that a questionnaire contains items ''i'', ''j'', and ''k''. Examples of such deterministic dependencies are then ''i'' → ''j'', ''i'' ∧ ''j'' → ''k'', and ''i'' ∨ ''j'' → ''k''. Since the basic work of Flament (1976) a number of different methods for Boolean analysis have been developed. See, for example, Buggenhaut and Degreef (1987), Duquenne (1987), item tree analysis Leeuwe (1974), Schrepp (1999), or Theuns (1998). These methods share the goal to derive deterministic dependencies between the items of a question ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Item Response Theory
In psychometrics, item response theory (IRT, also known as latent trait theory, strong true score theory, or modern mental test theory) is a paradigm for the design, analysis, and scoring of Test (student assessment), tests, questionnaires, and similar instruments measurement, measuring abilities, attitudes, or other variables. It is a theory of testing based on the relationship between individuals' performances on a test item and the test takers' levels of performance on an overall measure of the ability that item was designed to measure. Several different statistical models are used to represent both item and test taker characteristics. Unlike simpler alternatives for creating scales and evaluating questionnaire responses, it does not assume that each item is equally difficult. This distinguishes IRT from, for instance, Likert scaling, in which ''"''All items are assumed to be replications of each other or in other words items are considered to be parallel instruments". By contrast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Results Of ITA For ISSP 1995 Question 4
A result is the outcome of an event. Result or Results may also refer to: Music * ''Results'' (album), a 1989 album by Liza Minnelli * ''Results'', a 2012 album by Murder Construct * "The Result", a single by The Upsetters * "The Result", a song by Ennio Morricone from ''A Fistful of Dollars'' O.S.T. * "Results", a track from the soundtrack of the 2014 Indian film ''Jigarthanda'' Other uses * ''Result'' (schooner), a schooner built in Carrickfergus in 1893 * Result, New York, a populated place in Greene County * Result (cricket), final outcome (win, tie, or draw) in the bat-and-ball game of cricket * ''Results'' (film), a 2015 film starring Guy Pearce and Cobie Smulders * Results (organisation), a US poverty advocacy organization founded 1980 See also * Result merchant, see Glossary of contract bridge terms#R * '' Results May Vary'', an album by Limp Bizkit 2003 * Causality * Find (other) Find, FIND or Finding may refer to: Computing * find (Unix), a command on U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Germany
The old states of Germany () is a jargon referring to the ten of the sixteen states of the Federal Republic of Germany (FRG) that were part of West Germany and that unified with the eastern German Democratic Republic's 5 states, which are given the contrasting term new states of Germany. Usage of this terminology usually excludes one other state, Berlin, conterminous with the capital city of the reunified nation which used to be divided, with its western part linked with West Germany. The old states are Baden-Württemberg, Bavaria, Bremen, Hamburg, Hesse, Lower Saxony, North Rhine-Westphalia, Rhineland-Palatinate, Saarland, and Schleswig-Holstein. The state of Berlin, the result of a merger between East and West Berlin, is usually not considered one of the old states although West Berlin was associated with the Federal Republic of Germany, but its status was disputed because of the Four Power Agreement on Berlin. Demographics In the old states, the populations also dev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Identity
National identity is a person's identity or sense of belonging to one or more states or one or more nations. It is the sense of "a nation as a cohesive whole, as represented by distinctive traditions, culture, and language". National identity comprises both political and cultural elements. As a collective phenomenon, it can arise from the presence of "common points" in people's daily lives: national symbols, language, the nation's history, national consciousness, and cultural artifacts. Subjectively, it is a feeling one shares with a group of people about a nation, regardless of one's legal citizenship status. In psychological terms, it is defined as an "awareness of difference", a "feeling and recognition of 'we' and 'they'". National identity can incorporate the population, as well as diaspora, of Multi-ethnic state, multi-ethnic states and societies that have a shared sense of common identity. Hyphenated ethnicity, Hyphenated ethnicities are examples of the confluence of mul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Value System
In ethics and social sciences, value denotes the degree of importance of some thing or action, with the aim of determining which actions are best to do or what way is best to live ( normative ethics), or to describe the significance of different actions. Value systems are proscriptive and prescriptive beliefs; they affect the ethical behavior of a person or are the basis of their intentional activities. Often primary values are strong and secondary values are suitable for changes. What makes an action valuable may in turn depend on the ethical values of the objects it increases, decreases, or alters. An object with "ethic value" may be termed an "ethic or philosophic good" (noun sense). Values can be defined as broad preferences concerning appropriate courses of actions or outcomes. As such, values reflect a person's sense of right and wrong or what "ought" to be. "Equal rights for all", "Excellence deserves admiration", and "People should be treated with respect and dignity" are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minority Group
The term "minority group" has different meanings, depending on the context. According to common usage, it can be defined simply as a group in society with the least number of individuals, or less than half of a population. Usually a minority group is disempowered relative to the majority, and that characteristic lends itself to different applications of the term minority. In terms of sociology, economics, and politics, a demographic that takes up the smallest fraction of the population is not necessarily labelled the "minority" if it wields dominant power. In the academic context, the terms "minority" and "majority" are used in terms of hierarchical power structures. For example, in South Africa, during Apartheid, white Europeans held virtually all social, economic, and political power over black Africans. For this reason, black Africans are the "minority group", despite the fact that they outnumber white Europeans in South Africa. This is why academics more frequently use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insight
Insight is the understanding of a specific causality, cause and effect within a particular context. The term insight can have several related meanings: *a piece of information *the act or result of understanding the inner nature of things or of seeing Intuition (knowledge), intuitively (called in Greek) *an introspection *the power of acute observation and Deductive reasoning, deduction, discernment, and perception, called intellection or *an understanding of cause and effect based on the identification of relationships and behaviors within a model, system, context, or scenario (see artificial intelligence) An insight that manifests itself suddenly, such as understanding how to solve a difficult problem, is sometimes called by the German language, German word . The term was coined by the German psychologist and theoretical linguist Karl Bühler. It is also known as an epiphany (feeling), epiphany, Eureka effect, eureka moment, or (for crossword solvers) the penny dropping moment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Social Studies
In many countries' curricula, social studies is the combined study of humanities, the arts, and social sciences, mainly including history, economics, and civics. The term was coined by American educators around the turn of the twentieth century as a catch-all for these subjects, as well as others which did not fit into the models of lower education in the United States such as philosophy and psychology. One of the purposes of social studies, particularly at the level of higher education, is to integrate several disciplines, with their unique methodologies and special focuses of concentration, into a coherent field of subject areas that communicate with each other by sharing different academic "tools" and perspectives for deeper analysis of social problems and issues. Social studies aims to train students for informed, responsible participation in a diverse democratic society. It provides the necessary background knowledge in order to develop values and reasoned opinions, and the obje ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algebra
Algebra is a branch of mathematics that deals with abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication. Elementary algebra is the main form of algebra taught in schools. It examines mathematical statements using variables for unspecified values and seeks to determine for which values the statements are true. To do so, it uses different methods of transforming equations to isolate variables. Linear algebra is a closely related field that investigates linear equations and combinations of them called '' systems of linear equations''. It provides methods to find the values that solve all equations in the system at the same time, and to study the set of these solutions. Abstract algebra studies algebraic structures, which consist of a set of mathemati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematical Proof
A mathematical proof is a deductive reasoning, deductive Argument-deduction-proof distinctions, argument for a Proposition, mathematical statement, showing that the stated assumptions logically guarantee the conclusion. The argument may use other previously established statements, such as theorems; but every proof can, in principle, be constructed using only certain basic or original assumptions known as axioms, along with the accepted rules of inference. Proofs are examples of exhaustive deductive reasoning that establish logical certainty, to be distinguished from empirical evidence, empirical arguments or non-exhaustive inductive reasoning that establish "reasonable expectation". Presenting many cases in which the statement holds is not enough for a proof, which must demonstrate that the statement is true in ''all'' possible cases. A proposition that has not been proved but is believed to be true is known as a conjecture, or a hypothesis if frequently used as an assumption for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
