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Intervening Variable
In statistics, a mediation model seeks to identify and explain the mechanism or process that underlies an observed relationship between an independent variable and a dependent variable via the inclusion of a third hypothetical variable, known as a mediator variable (also a mediating variable, intermediary variable, or intervening variable). Rather than a direct causal relationship between the independent variable and the dependent variable, a mediation model proposes that the independent variable influences the mediator variable, which in turn influences the dependent variable. Thus, the mediator variable serves to clarify the nature of the causal relationship between the independent and dependent variables. Mediation analyses are employed to understand a known relationship by exploring the underlying mechanism or process by which one variable influences another variable through a mediator variable.Cohen, J.; Cohen, P.; West, S. G.; Aiken, L. S. (2003) ''Applied Multiple Regressio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simple Mediation Model
Simple or SIMPLE may refer to: *Simplicity, the state or quality of being simple Arts and entertainment * Simple (album), ''Simple'' (album), by Andy Yorke, 2008, and its title track * Simple (Florida Georgia Line song), "Simple" (Florida Georgia Line song), 2018 * "Simple", a song by Johnny Mathis from the 1984 album ''A Special Part of Me'' * "Simple", a song by Collective Soul from the 1995 album ''Collective Soul (1995 album), Collective Soul'' * "Simple", a song by Katy Perry from the 2005 soundtrack to ''The Sisterhood of the Traveling Pants (film), The Sisterhood of the Traveling Pants'' * "Simple", a song by Khalil from the 2017 album ''Prove It All'' * "Simple", a song by Kreesha Turner from the 2008 album ''Passion (Kreesha Turner album), Passion'' * "Simple", a song by Ty Dolla Sign from the 2017 album ''Beach House 3'' deluxe version * Simple (video game series), ''Simple'' (video game series), budget-priced console games Businesses and organisations * Simple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bootstrapping (statistics)
Bootstrapping is a procedure for estimating the distribution of an estimator by resampling (often with replacement) one's data or a model estimated from the data. Bootstrapping assigns measures of accuracy ( bias, variance, confidence intervals, prediction error, etc.) to sample estimates.software This technique allows estimation of the sampling distribution of almost any statistic using random sampling methods. Bootstrapping estimates the properties of an estimand (such as its ) by measuring those properties when sampling from an approximating distribution. One standard choice for an approximating distributi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediated Moderation Model 1
''Mediated: How the Media Shapes Your World and the Way You Live in It'' is a non-fiction book by anthropologist Thomas de Zengotita published in 2005 by Bloomsbury about the effect of the media in the Western world. Summary ''Mediated'' aims at creating awareness rather than offering ready-made solutions to remedy the intrusion of too much media in our industrial societies. Rather than writing yet another pamphlet against the media, the author chooses to focus on the mechanisms and the processes of our ''mediated'' society. The basis of his analysis is that the opposite of reality is not phony or superficial, it is optional. We choose between options to determine who we are, to make statements to the world about who we are. People, he argues, have always done so, but the difference with today's situation is that we have a lot more options. In terms of options, comparing the modern world with the post-modern world is like comparing a breeze with a hurricane. The media forc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moderated Mediation
Moderated mediation, also known as conditional indirect effects,Preacher, K. J., Rucker, D. D., & Hayes, A. F. (2007) Addressing moderated mediation hypotheses: Theory, Methods, and Prescriptions. ''Multivariate Behavioral Research, 42,'' 185–227. occurs when the treatment effect of an independent variable A on an outcome variable C via a mediator variable B differs depending on levels of a moderator variable D. Specifically, either the effect of A on B, and/or the effect of B on C depends on the level of D. In statistics, Moderation (statistics), moderation and Mediation (statistics), mediation can occur together in the same model.Muller, D., Judd, C. M., & Yzerbyt, V. Y. (2005). When moderation is mediated and mediation is moderated. ''Journal of Personality and Social Psychology, 89'', 852–863. Langfred (2004) model Langfred (2004) was the first to provide a comprehensive treatment of the question of how to conceptualize moderated mediation, classify different types of modera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interaction Effect
In statistics, an interaction may arise when considering the relationship among three or more variables, and describes a situation in which the effect of one causal variable on an outcome depends on the state of a second causal variable (that is, when effects of the two causes are not additive). Although commonly thought of in terms of causal relationships, the concept of an interaction can also describe non-causal associations (then also called ''moderation'' or ''effect modification''). Interactions are often considered in the context of regression analyses or factorial experiments. The presence of interactions can have important implications for the interpretation of statistical models. If two variables of interest interact, the relationship between each of the interacting variables and a third "dependent variable" depends on the value of the other interacting variable. In practice, this makes it more difficult to predict the consequences of changing the value of a variable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moderating Variable
In statistics and regression analysis, moderation (also known as effect modification) occurs when the relationship between two variables depends on a third variable. The third variable is referred to as the moderator variable (or effect modifier) or simply the moderator (or modifier). The effect of a moderating variable is characterized statistically as an interaction (statistics), interaction; that is, a Categorical variable, categorical (e.g., sex, ethnicity, class) or Level of measurement, continuous (e.g., age, level of reward) variable (mathematics), variable that is associated with the direction and/or magnitude of the relation between dependent and independent variables. Specifically within a correlational analysis framework, a moderator is a third variable that affects the zero-order correlation between two other variables, or the value of the slope of the dependent variable on the independent variable. In analysis of variance (ANOVA) terms, a basic moderator effect can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suppressor Variable
A suppressor variable is a variable that increases the predictive validity of another variable when included in a regression equation. Krus, D. J., & Wilkinson, S. M. (1986). Demonstration of properties of a suppressor variable. ''Behavior Research Methods, Instruments, & Computers'', 18(1), 21-24. Suppression can occur when a single causal variable is related to an outcome variable through two separate mediator variables, and when one of those mediated effects is positive and one is negative. In such a case, each mediator variable suppresses or conceals the effect that is carried through the other mediator variable. For example, higher intelligence scores (a causal variable, A) may cause an increase in error detection (a mediator variable, B) which in turn may cause a decrease in errors made at work on an assembly line (an outcome variable, X); at the same time, intelligence could also cause an increase in boredom (C), which in turn may cause an increase in errors (X). Thus, in one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiEdu Image 2
The Wiki Education (sometimes called Wiki Edu or the Wiki Education Foundation) is a 501(c)(3) nonprofit organization based in Chico, California, United States. It promotes the integration of Wikipedia into coursework by educators around the world. History A pilot project was started by the Wikimedia Foundation in 2010, then called the Public Policy Initiative, to engage students and faculty from universities around the world in improving academic articles. The project spun-off into its own nonprofit after three years. The Wiki Education Foundation incorporated in 2013, a process that the Wikimedia Foundation began in 2012 to give the education program "more focused and specialized support" and to "develop additional programs to promote academic research and teaching that engage with Wikipedia". In 2016, Wiki Education chose a theme for the year, which was around improving science articles. At the celebration of its 10th anniversary in 2024, the foundation reported having ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediation Model With Two Covariates
Mediation is a structured, voluntary process for resolving disputes, facilitated by a neutral third party known as the mediator. It is a structured, interactive process where an independent third party, the mediator, assists disputing parties in resolving conflict through the use of specialized communication and negotiation techniques. All participants in mediation are encouraged to participate in the process actively. Mediation is "party-centered," focusing on the needs, interests, and concerns of the individuals involved, rather than imposing a solution from an external authority. The mediator uses a wide variety of techniques to guide the process in a constructive direction and to help the parties find their optimal solution. Mediation can take different forms, depending on the mediator's approach. In facilitative mediation, the mediator assists parties by fostering communication and helping them understand each other's viewpoints. In evaluative mediation, the mediator may a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Confounding Variable
In causal inference, a confounder is a variable that influences both the dependent variable and independent variable, causing a spurious association. Confounding is a causal concept, and as such, cannot be described in terms of correlations or associations.Pearl, J., (2009). Simpson's Paradox, Confounding, and Collapsibility In ''Causality: Models, Reasoning and Inference'' (2nd ed.). New York : Cambridge University Press. The existence of confounders is an important quantitative explanation why correlation does not imply causation. Some notations are explicitly designed to identify the existence, possible existence, or non-existence of confounders in causal relationships between elements of a system. Confounders are threats to internal validity. Example Let's assume that a trucking company owns a fleet of trucks made by two different manufacturers. Trucks made by one manufacturer are called "A Trucks" and trucks made by the other manufacturer are called "B Trucks. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Causal Model
In metaphysics, a causal model (or structural causal model) is a conceptual model that describes the causal mechanisms of a system. Several types of causal notation may be used in the development of a causal model. Causal models can improve study designs by providing clear rules for deciding which independent variables need to be included/controlled for. They can allow some questions to be answered from existing observational data without the need for an interventional study such as a randomized controlled trial. Some interventional studies are inappropriate for ethical or practical reasons, meaning that without a causal model, some hypotheses cannot be tested. Causal models can help with the question of ''external validity'' (whether results from one study apply to unstudied populations). Causal models can allow data from multiple studies to be merged (in certain circumstances) to answer questions that cannot be answered by any individual data set. Causal models have found ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moderation (statistics)
In statistics and regression analysis, moderation (also known as effect modification) occurs when the relationship between two variables depends on a third variable. The third variable is referred to as the moderator variable (or effect modifier) or simply the moderator (or modifier). The effect of a moderating variable is characterized statistically as an interaction; that is, a categorical (e.g., sex, ethnicity, class) or continuous (e.g., age, level of reward) variable that is associated with the direction and/or magnitude of the relation between dependent and independent variables. Specifically within a correlational analysis framework, a moderator is a third variable that affects the zero-order correlation between two other variables, or the value of the slope of the dependent variable on the independent variable. In analysis of variance (ANOVA) terms, a basic moderator effect can be represented as an interaction between a focal independent variable and a factor that spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
