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Hawthorne Experiments
The Hawthorne effect is a type of reactivity in which individuals modify an aspect of their behavior in response to their awareness of being observed. The effect was discovered in the context of research conducted at the Hawthorne Western Electric plant; however, some scholars feel the descriptions are apocryphal. The original research involved workers who made electrical relays at the Hawthorne Works, a Western Electric plant in Cicero, Illinois. Between 1924 and 1927, the lighting study was conducted. Workers experienced a series of lighting changes in which productivity was said to increase with almost any change in the lighting. This turned out ''not'' to be true. In the study that was associated with Elton Mayo, which ran from 1928 to 1932, a series of changes in work structure were implemented (e.g., changes in rest periods) in a group of five women. However, this was a methodologically poor, uncontrolled study that did not permit any firm conclusions to be drawn. One of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reactivity (psychology)
Reactivity is a phenomenon that occurs when individuals alter their performance or behavior due to the awareness that they are being observed. The change may be positive or negative, and depends on the situation. It is a significant threat to a research study's external validity and is typically controlled for using blind experiment designs. There are several forms of reactivity. The Hawthorne effect occurs when research study participants know they are being studied and alter their performance because of the attention they receive from the experimenters. The John Henry effect, a specific form of Hawthorne effect, occurs when the participants in the control group alter their behavior out of awareness that they are in the control group. Reactivity is not limited to changes in behaviour in relation to being merely observed; it can also refer to situations where individuals alter their behavior to conform to the expectations of the observer. An experimenter effect occurs when t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peer Group
In sociology, a peer group is both a social group and a Primary and secondary groups, primary group of people who have similar interests (homophily), age, background, or social status. The members of this group are likely to influence the person's beliefs and behaviour. During adolescence, peer groups tend to face dramatic changes. Adolescents tend to spend more time with their peers and have less adult supervision. Adolescents' communication shifts during this time as well. They prefer to talk about school and their careers with their parents, and they enjoy talking about sex and other interpersonal relationships with their peers. Children look to join peer groups who accept them, even if the group is involved in negative activities. Children are less likely to accept those who are different from them. Cliques are small groups typically defined by common interests or by friendship. Cliques typically have 2–12 members and tend to be form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Journal Of Sociology
The ''American Journal of Sociology'' is a peer-reviewed bi-monthly academic journal that publishes original research and book reviews in the field of sociology and related social sciences. It was founded in 1895 as the first journal in its discipline. The current editor is Elisabeth S. Clemens. For its entire history, the journal has been housed at the University of Chicago and published by the University of Chicago Press. Past editors Past editors-in-chief of the journal have been: From 1926 to 1933, the journal was co-edited by a number of different members of the University of Chicago faculty including Ellsworth Faris, Robert E. Park, Ernest Burgess, Fay-Cooper Cole, Marion Talbot, Frederick Starr, Edward Sapir, Louis Wirth, Eyler Simpson, Edward Webster, Edwin Sutherland, William Ogburn, Herbert Blumer, and Robert Redfield. Abstracting and indexing According to the ''Journal Citation Reports'', its 2019 impact factor was 3.232, ranking it 8th out of 150 journals in the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Experiment
An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments provide insight into Causality, cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated. Experiments vary greatly in goal and scale but always rely on repeatable procedure and logical analysis of the results. There also exist natural experiment, natural experimental studies. A child may carry out basic experiments to understand how things fall to the ground, while teams of scientists may take years of systematic investigation to advance their understanding of a phenomenon. Experiments and other types of hands-on activities are very important to student learning in the science classroom. Experiments can raise test scores and help a student become more engaged and interested in the material they are learning, especially when used over time. Experiments can vary from personal and in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John A
Sir John Alexander Macdonald (January 10 or 11, 1815 – June 6, 1891) was the first prime minister of Canada, serving from 1867 to 1873 and from 1878 to 1891. The dominant figure of Canadian Confederation, he had a political career that spanned almost half a century. Macdonald was born in Scotland; when he was a boy his family immigrated to Kingston in the Province of Upper Canada (today in eastern Ontario). As a lawyer, he was involved in several high-profile cases and quickly became prominent in Kingston, which elected him in 1844 to the legislature of the Province of Canada. By 1857, he had become premier under the colony's unstable political system. In 1864, when no party proved capable of governing for long, Macdonald agreed to a proposal from his political rival, George Brown, that the parties unite in a Great Coalition to seek federation and political reform. Macdonald was the leading figure in the subsequent discussions and conferences, which resulted in the Brit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steven Levitt
Steven David Levitt (born May 29, 1967) is an American economist and co-author of the best-selling book ''Freakonomics'' and its sequels (along with Stephen J. Dubner). Levitt was the winner of the 2003 John Bates Clark Medal for his work in the field of crime, and is currently the William B. Ogden Distinguished Service Professor of Economics at the University of Chicago as well as the Faculty Director and Co-Founder of the Center for Radical Innovation for Social Change at the University of Chicago which incubates the Data Science for Everyone coalition. He was co-editor of the ''Journal of Political Economy'' published by the University of Chicago Press until December 2007. In 2009, Levitt co-founded TGG Group, a business and philanthropy consulting company. He was chosen as one of ''Time'' magazine's "100 People Who Shape Our World" in 2006. A 2011 survey of economics professors named Levitt their fourth favorite living economist under the age of 60, after Paul Krugman, Greg M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harry Braverman
Harry Braverman (1920 – 1976) Agitating during the Red Scare After serving in the shipbuilding industry during World War II, Braverman began to deepen his commitment to revolutionary struggle, joining the first Trotskyist party in the United States: the Socialist Workers Party (SWP). His political engagement coincided the wave of political repression against socialists and communists known as the Red Scare. Even before the end of World War II, 18 SWP leaders were imprisoned, becoming "the first victims of the notorious Smith Act, which made it a crime of treason to publish and proclaim the ideas of Marx, Engels, Lenin, and Trotsky." Braverman himself was fired from his job at Republic Steel as a result of red-baiting tactics used by the FBI. Undeterred by the witch-hunts, Braverman continued his political work but disguised his activities by writing under the pseudonym "Harry Frankel". Socialist Unity In the 1950s, Braverman was one of the leaders of the so-called "Cochrani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Educational Research
Educational research refers to the systematic collection and analysis of data related to the field of education. Research may involve a variety of methods and various aspects of education including student learning, teaching methods, teacher training, and classroom dynamics. Educational researchers generally agree that research should be rigorous and systematic. However, there is less agreement about specific standards, criteria and research procedures. As a result, the value and quality of educational research has been questioned. Educational researchers may draw upon a variety of disciplines including psychology, economics, sociology, anthropology, and philosophy. Methods may be drawn from a range of disciplines. Conclusions drawn from an individual research study may be limited by the characteristics of the participants who were studied and the conditions under which the study was conducted. General characteristics Gary Anderson outlined ten aspects of educational research: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mica
Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into extremely thin elastic plates. This characteristic is described as perfect basal cleavage. Mica is common in igneous and metamorphic rock and is occasionally found as small flakes in sedimentary rock. It is particularly prominent in many granites, pegmatites, and schists, and "books" (large individual crystals) of mica several feet across have been found in some pegmatites. Micas are used in products such as drywalls, paints, fillers, especially in parts for automobiles, roofing and shingles, as well as in electronics. The mineral is used in cosmetics and food to add "shimmer" or "frost." Properties and structure The mica group is composed of 37 phyllosilicate minerals. All crystallize in the monoclinic system, with a tendency towards pseudohexagonal crystals, and are similar in structure but vary in chemical composition. Micas are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Experimenter Effect
The observer-expectancy effect (also called the experimenter-expectancy effect, expectancy bias, observer effect, or experimenter effect) is a form of reactivity in which a researcher's cognitive bias causes them to subconsciously influence the participants of an experiment. Confirmation bias can lead to the experimenter interpreting results incorrectly because of the tendency to look for information that conforms to their hypothesis, and overlook information that argues against it. It is a significant threat to a study's internal validity, and is therefore typically controlled using a double-blind experimental design. It may include conscious or unconscious influences on subject behavior including creation of demand characteristics that influence subjects, and altered or selective recording of experimental results themselves. Overview The experimenter may introduce cognitive bias into a study in several ways. In what is called the observer-expectancy effect, the experimen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manipulation Checks
Manipulation check is a term in experimental research in the social sciences which refers to certain kinds of secondary evaluations of an experiment. Overview Manipulation checks are measured variables that show what the manipulated variables concurrently affect besides the dependent variable of interest. In experiments, an experimenter manipulates some aspect of a process or task and randomly assigns subjects to different levels of the manipulation ("experimental conditions"). The experimenter then observes whether variation in the manipulated variables cause differences in the dependent variable. Manipulation checks are targeted at variables beside the dependent variable of interest. Manipulations are not intended to verify that the manipulated factor caused variation in the dependent variable. This is verified by random assignment, manipulation before measurement of the dependent variable, and statistical tests of effect of the manipulated variable on the dependent variable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Theodore Orne
Martin Theodore Orne (October 16, 1927, Vienna, Austria – February 11, 2000, Paoli, Pennsylvania, US) was a professor of psychiatry and psychology at the University of Pennsylvania. Orne is best known for his pioneering research into demand characteristics, illustrating the weakness of informing participants that they are taking part in a psychology experiment and yet expecting them to act normally. He was well known as a researcher in the field of hypnosis and is also noted for his involvement with the poet Anne Sexton, and with the trials of Patty Hearst and Kenneth Bianchi. Personal life and education Orne was born on October 16, 1927, to Frank Orne, a surgeon and Martha Brunner, a psychiatrist in Vienna, Austria. His family moved from Austria to escape the Nazi Anschluss and relocated to New York City in 1938. He studied at the Bronx High School of Science. He later moved to Boston and studied at Harvard University. Orne enlisted in the U.S. Army during World War II a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
