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Experimenter's Bias
Observer bias is one of the types of detection bias and is defined as any kind of systematic divergence from accurate facts during observation and the recording of data and information in studies. The definition can be further expanded upon to include the systematic difference between what is observed due to variation in observers, and what the true value is. Observer bias is the tendency of observers to not see what is there, but instead to see what they expect or want to see. This is a common occurrence in the everyday lives of many and is a significant problem that is sometimes encountered in scientific research and studies. Observation is critical to scientific research and activity, and as such, observer bias may be as well. When such biases exist, scientific studies can result in an over- or underestimation of what is true and accurate, which compromises the validity of the findings and results of the study, even if all other designs and procedures in the study were appropria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detection Bias
In the field of statistics, bias is a systematic tendency in which the methods used to gather data and estimate a sample statistic present an inaccurate, skewed or distorted (''biased'') depiction of reality. Statistical bias exists in numerous stages of the data collection and analysis process, including: the source of the data, the methods used to collect the data, the estimator chosen, and the methods used to analyze the data. Data analysts can take various measures at each stage of the process to reduce the impact of statistical bias in their work. Understanding the source of statistical bias can help to assess whether the observed results are close to actuality. Issues of statistical bias has been argued to be closely linked to issues of statistical validity. Statistical bias can have significant real world implications as data is used to inform decision making across a wide variety of processes in society. Data is used to inform lawmaking, industry regulation, corpor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clever Hans
Clever Hans (; ) was a horse that appeared to perform arithmetic and other intellectual tasks during exhibitions in Germany in the early 20th century. In 1907, psychologist Oskar Pfungst demonstrated that the horse was not actually performing these mental tasks, but was watching the reactions of his trainer. The horse was responding directly to involuntary cues in the body language of the human trainer, who was entirely unaware that he was providing such cues. In honour of Pfungst's study, this type of artifact in research methodology has since been referred to as the ''Clever Hans effect'' and has continued to be important to the observer-expectancy effect and later studies in animal cognition. Pfungst was an assistant to German philosopher and psychologist Carl Stumpf, who incorporated the experience with Hans into his further work on animal psychology and his ideas on Phenomenology (philosophy), phenomenology. Spectacle During the early twentieth century, the public was espec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oskar Pfungst
Oskar Pfungst (21 April 1874 – 14 August 1932) was a German comparative biologist and psychologist. While working as a volunteer assistant in the laboratory of Carl Stumpf in Berlin, Pfungst was asked to investigate the horse known as Clever Hans, who could apparently solve a wide array of arithmetic problems set to it by its owner. After formal investigation in 1907, Pfungst demonstrated that the horse was not actually performing intellectual tasks, but was watching the reaction of his human observers. Pfungst discovered this artifact in the research methodology, wherein the horse was responding directly to involuntary clues in the body language of the human trainer, who had the faculties to solve each problem. The trainer was entirely unaware that he was providing such clues. In honour of Pfungst's study, the anomalous artifact has since been referred to as the Clever Hans effect and has continued to be important knowledge in the observer effect and later studies in animal cogn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyril Burt
Sir Cyril Lodowic Burt, Fellow of the British Academy, FBA (3 March 1883 – 10 October 1971) was an English educational psychology, educational psychologist and geneticist who also made contributions to statistics. He is known for his studies on the heritability of IQ. Shortly after he died, his studies of inheritance of intelligence were discredited after evidence emerged indicating he had scientific misconduct, falsified research data, inventing correlations in separated twins which did not exist, alongside other fabrications. Childhood and education Burt was born on 3 March 1883, the first child of Cyril Cecil Barrow Burt (b. 1857), a medical practitioner, and his wife, Martha Decina Evans. He was born in London (some sources give his place of birth as Stratford-upon-Avon, probably because his entry in ''Who's Who (UK), Who's Who'' gave his father's address as Snitterfield, Stratford; in fact the Burt family moved to Snitterfield when he was ten). Burt's father initially ke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Rosenthal (psychologist)
Robert Rosenthal (March 2, 1933 – January 5, 2024) was a German-born American psychologist who was a Distinguished Professor of Psychology at the University of California, Riverside. His interests included self-fulfilling prophecies, which he explored in a well-known study of the Pygmalion effect: the effect of teachers' expectations on students. Biography Rosenthal was born in Gießen, Hesse, on March 2, 1933, and left Germany with his family at the age of six and arrived in the U.S. in 1940. In 1956, he was awarded a PhD by the University of California, Los Angeles. He started his career as a clinical psychologist and then moved into social psychology. From 1962 to 1999 he taught at Harvard, became chairman of the psychology department there in 1992, and Edgar Pierce Professor of Psychology in 1995. On retiring from Harvard in 1999, he went to California. Much of his work has focused on nonverbal communication, particularly its influence on expectations: for example, in doct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elton Mayo
George Elton Mayo (26 December 1880 – 7 September 1949) was an Australian born psychologist, industrial researcher, and organizational theorist.Cullen, David O'Donald. ''A new way of statecraft: The career of Elton Mayo and the development of the social sciences in America, 1920–1940.'' ProQuest Dissertations and Theses; 1992; ProQuest Dissertations & Theses Full Text.Miner, J.B. (2006). ''Organizational behavior, Vol. 3: Historical origins, theoretical foundations, and the future''. Armonk, NY and London: M.E. Sharpe. Mayo was formally trained at the University of Adelaide, acquiring a Bachelor of Arts Degree graduating with First Class Honours, majoring in philosophy and psychology, and was later awarded an honorary Master of Arts Degree from the University of Queensland (UQ). While in Queensland, Mayo served on the University's war committee and pioneered research into the psychoanalytic treatment of shell-shock. As a psychologist Mayo often helped soldiers returning fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawthorne Effect
The Hawthorne effect is a type of human behavior 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 think the descriptions are fictitious. 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, wherein workers experienced a series of lighting changes that were said to increase productivity. This conclusion turned out to be false. In an Elton Mayo study that ran from 1927 to 1928, a series of changes in work structure were implemented (e.g. changes in rest periods) in a group of six women. However, this was a methodologically poor, uncontrolled study from which no firm conclusions could be drawn. Elton Mayo later conducted two additional experiments to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer-expectancy Effect
The observer-expectancy 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 in the observer-expectancy effect, the experimenter may subtly communicate their expectations for the outcome of the study to the participants, causing them to alter their be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
