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Observer Effect (other)
Observer effect, observer bias, observation effect, or observation bias may refer to a number of concepts, some of them closely related: General experimental biases * Hawthorne effect, a form of reactivity in which subjects modify an aspect of their behavior, in response to their knowing that they are being studied * Observer-expectancy effect, a form of reactivity in which a researcher's cognitive bias causes them to unconsciously influence the participants of an experiment * Observer bias, a detection bias in research studies resulting for example from an observer's cognitive biases * Observer's paradox, a situation in which the phenomenon being observed is unwittingly influenced by the presence of the observer. Physics * Observer effect (physics), the impact of observing a physical system * Probe effect, the effect on a physical system of adding measurement devices, such as the probes of electronic test equipment Computing * Heisenbug of computer programming, in which a ... [...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] |
Observer 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] |
Observer Effect (physics)
In physics, the observer effect is the disturbance of an observed system by the act of observation. This is often the result of utilising instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire, which causes some of the air to escape, thereby changing the amount of pressure one observes. Similarly, seeing non-luminous objects requires light hitting the object to cause it to reflect that light. While the effects of observation are often negligible, the object still experiences a change (leading to the Schrödinger's cat thought experiment). This effect can be found in many domains of physics, but can usually be reduced to insignificance by using different instruments or observation techniques. A notable example of the observer effect occurs in quantum mechanics, as demonstrated by the double-slit experiment. Physicists have found that observation of quantum phenomena by a detector or an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Probe Effect
Probe effect is an unintended alteration in system behavior caused by measuring that system. In code profiling and performance measurements, the delays introduced by insertion or removal of code instrumentation may result in a non-functioning application, or unpredictable behavior. Examples In electronics, by attaching a multimeter, oscilloscope, or other testing device via a test probe, small amounts of capacitance, resistance, or inductance may be introduced. Though good scopes have very slight effects, in sensitive circuitry these can lead to unexpected failures, or conversely, unexpected fixes to failures. In debugging of parallel computer programs, sometimes failures (such as deadlocks) are not present when the debugger's code (which was meant to help to find a reason for deadlocks by visualising points of interest in the program code) is attached to the program. This is because additional code changed the timing of the execution of parallel processes, and because of that de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heisenbug
In computer programming jargon, a heisenbug is a software bug that seems to disappear or alter its behavior when one attempts to study it. The term is a pun on the name of Werner Heisenberg, the physicist who first asserted the observer effect of quantum mechanics, which states that the act of observing a system inevitably alters its state. In electronics, the traditional term is probe effect, where attaching a test probe to a device changes its behavior. Similar terms, such as ''bohrbug'', ''mandelbug'', ''hindenbug'', and ''schrödinbug'' (see the section on related terms) have been occasionally proposed for other kinds of unusual software bugs, sometimes in jest. Examples Heisenbugs occur because common attempts to debug a program, such as inserting output statements or running it with a debugger, usually have the side-effect of altering the behavior of the program in subtle ways, such as changing the memory addresses of variables and the timing of its execution. O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer Effect (information Technology)
In information technology, the observer effect is the impact on the behaviour of a computer process caused by the act of observing the process while it is running. For example: if a process uses a log file to record its progress, the process could slow down. Furthermore, the act of viewing the file while the process is running could cause an I/O error in the process, which could, in turn, cause it to stop. Another example would be observing the performance of a CPU by running both the observed and observing programs on the same CPU, which will lead to inaccurate results because the observer program itself affects the CPU performance (modern, heavily cached and pipelined CPUs are particularly affected by this kind of observation). The observer effect could either have a positive or negative impact on the computer process behaviour. A positive impact can be software bugs, also known as Heisenbugs, which diminish or change their negative behavior when observation mechanisms, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bystander Effect
The bystander effect, or bystander apathy, is a social psychological theory that states that individuals are less likely to offer help to a victim in the presence of other people. The theory was first proposed in 1964 after the murder of Kitty Genovese, in which a newspaper had reported (albeit somewhat erroneously) that 37 bystanders saw or heard the attack without coming to her assistance or calling the police. Much research, mostly in psychology research laboratories, has focused on increasingly varied factors, such as the number of bystanders, ambiguity, group cohesiveness, and diffusion of responsibility that reinforces mutual denial. If a single individual is asked to complete a task alone, the sense of responsibility will be strong, and there will be a positive response; however, if a group is required to complete a task together, each individual in the group will have a weak sense of responsibility, and will often shrink back in the face of difficulties or responsibilit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actor–observer Asymmetry
Actor–observer asymmetry (also actor–observer bias or actor–observer difference) is a bias one exhibits when forming attributions about the behavior of others or themselves. When explaining their own behavior, people are more likely to attribute their actions to the particular situation rather than their personality, also known as a situational attribution. However, when an observer is explaining the behavior of another person, they are more likely to attribute this behavior to the actors' personality rather than situational factors, also known as dispositional attribution. For example, a politician explaining why they voted against war may say it is because war is not needed, a situational factor. On the other hand, a person judging why the politician voted in this way may say it is because the politician is too liberal, a personality trait. Sometimes, the actor–observer asymmetry is defined as the fundamental attribution error, defined as when people tend to explain be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demonstration Effect
Demonstration effects are effects on the behavior of individuals caused by observation of the actions of others and their consequences. The term is particularly used in political science and sociology to describe the fact that developments in one place will often act as a catalyst in another place. Examples Parents may take care of their parents to create a demonstration effect by which their children later care for them. Countries and local governments may adopt laws and economic policies similar to those that appear to demonstrate success elsewhere. The proven success of the policies provides a demonstration effect that leads other governments to attempt to emulate that success. Tourism The demonstration effect has been observed as a natural consequence of tourism. One study argues that the demonstration effect can be broken down into four forms: exact imitation, deliberately inexact imitation, accidental inexact imitation, and social learning. Economics In economics, demonst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |