enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Mediation (statistics) - Wikipedia

    en.wikipedia.org/wiki/Mediation_(statistics)

    Simple mediation model. The independent variable causes the mediator variable; the mediator variable causes the dependent 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 ...

  3. Moderated mediation - Wikipedia

    en.wikipedia.org/wiki/Moderated_mediation

    Moderated mediation, also known as conditional indirect effects, [2] 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.

  4. Sobel test - Wikipedia

    en.wikipedia.org/wiki/Sobel_test

    For example sections c + d represent the effect of the independent variable on the dependent variable, if we ignore the mediator, and corresponds to τ. This total amount of variance in the dependent variable that is accounted for by the independent variable can then be broken down into areas c and d.

  5. Brunswik's lens model - Wikipedia

    en.wikipedia.org/wiki/Brunswik's_lens_model

    Brunswik's lens model is a conceptual framework for describing and studying how people make judgments. For example, a person judging the size of a distant object, physicians assessing the severity of disease, investors judging the quality of stocks, weather forecasters predicting tomorrow's weather and personnel officers rating job candidates all face similar tasks.

  6. Influence of mass media - Wikipedia

    en.wikipedia.org/wiki/Influence_of_mass_media

    Additionally, examining indirect effects can lead to a less biased estimation of effects sizes in empirical research (Holbert & Stephenson 2003). [69] In a model including mediating and moderating variables, it is the combination of direct and indirect effects that makes up the total effect of an independent variable on a dependent variable.

  7. Attitude-toward-the-ad models - Wikipedia

    en.wikipedia.org/wiki/Attitude-toward-the-ad_models

    The four alternative models of advertising attitude explain how antecedent variables related to advertising outcomes are mediated by attitude toward advertising. These models are named the affect transfer, dual mediation, reciprocal mediation, and independent influences hypotheses. Model 1. The affect transfer hypothesis (ATH).

  8. Spurious relationship - Wikipedia

    en.wikipedia.org/wiki/Spurious_relationship

    Graphical model: Whereas a mediator is a factor in the causal chain (top), a confounder is a spurious factor incorrectly implying causation (bottom). In statistics, a spurious relationship or spurious correlation [1] [2] is a mathematical relationship in which two or more events or variables are associated but not causally related, due to either coincidence or the presence of a certain third ...

  9. Lord's paradox - Wikipedia

    en.wikipedia.org/wiki/Lord's_paradox

    In three papers, Frederic M. Lord gave examples when statisticians could reach different conclusions depending on whether they adjust for pre-existing differences. [ 1 ] [ 2 ] [ 3 ] Holland & Rubin (1983) used these examples to illustrate how there may be multiple valid descriptive comparisons in the data, but causal conclusions require an ...