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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 relationship between the independent and dependent variables.

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rdfs:label
  • Mediazione (statistica) (it)
  • 매개변인 (ko)
  • Mediation (statistics) (en)
  • Mediator (statistiek) (nl)
  • Analiza mediacji (pl)
  • Mediação (estatística) (pt)
  • Медиация в статистике (ru)
  • 中介變項 (zh)
rdfs:comment
  • 매개변인(媒介變因, mediator variable, mediation variable)은 독립변인과 종속변인의 연결고리 역할을 하는 변인(變因)이다. 매개변인은 독립변인의 결과이면서 동시에 종속변인의 원인이 되는 변인이다. 매개변인은 독립변인과 종속변인의 관계 이면에 숨어있는 인과적 구조를 이해하고자 할 때 이용한다. 매개변인이 통계적으로 유의하게 독립변인과 종속변인을 연결하려면 다음과 같은 네 가지 조건을 만족시켜야 한다. 1. * 독립변인과 종속변인의 관계(t)가 유의해야 한다 2. * 독립변인과 매개변인의 관계(a)가 유의해야 한다 3. * 매개변인과 종속변인의 관계(b)가 유의해야 한다 4. * 매개변인인 추가된 모형에서의 독립변인 효과(c)가 매개변인이 없는 모형에서의 독립변인 효과(t)보다 작아야 한다. 즉, c<t이어야 한다. (ko)
  • 在统计學中,一个中介模型的作用是确定並解释在獨立變項與因變項之間的第三個假設變數(即中介變項)。在原本独立变項和因變變項直接的因果关系之间之外,中介模型嘗試顯示独立变項亦能影響中介變項,再藉由中介變項影響控制變項。因此,中介变數用來闡明獨立變項與因變變項的關係。 (zh)
  • 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 relationship between the independent and dependent variables. (en)
  • In statistica, un modello di mediazione cerca di individuare e spiegare il meccanismo o processo che sottende un legame osservato tra una variabile indipendente e una variabile dipendente tramite l'inserimento di una terza variabile ipotetica, conosciuta come variabile mediatrice (anche una variabile di mediazione, variabile intermediaria, variabile interveniente, o fattore di mediazione ). Piuttosto che una relazione causale diretta tra la variabile indipendente e la variabile dipendente, in un modello di mediazione si investiga l'ipotesi che la variabile indipendente influenzi la variabile mediatrice (non sempre nota a priori), che a sua volta influenza la variabile dipendente. Pertanto, la variabile mediatrice serve a chiarire la natura della relazione tra le variabili indipendenti e di (it)
  • Een mediator is een statistische variabele die de relatie tussen twee andere variabelen verklaart. Een voorbeeld: er is een samenhang tussen het ervaren van een positieve band met de leerkracht en de leerprestaties van kinderen. Een verklaring hiervoor is dat kinderen zich meer inzetten voor school als zij een goede band met de leerkracht ervaren. Schoolinzet is dan de mediator die het verband tussen de leerkracht-leerling relatie en goede schoolprestaties verklaart. (nl)
  • Analiza mediacji (ang. mediational analysis) – procedura statystyczna będącą specyficzną formą analizy ścieżkowej, w ramach której testuje się, czy związek dwóch zmiennych istnieje za pośrednictwem jakiejś trzeciej zmiennej, zwanej mediatorem (lub inaczej zmienną pośredniczącą). Analiza mediacji została wprowadzona do psychologii w 1986 r. przez Reubena Barona i Davida Kenny'ego. W artykule pt. The moderator-mediator variable distinction in social psychological research: Conceptual, strategic, and statistical considerations przedstawili oni jak krok po kroku zbudować model mediacji: (pl)
  • Em estatística, um modelo de mediação procura identificar e explicar o mecanismo ou processo subjacente a uma relação observada entre uma variável independente e uma variável dependente através da inclusão de uma terceira variável hipotética, conhecida como variável mediadora (ou variável intermediária). Ao invés de uma relação causal direta entre a variável independente e a variável dependente, um modelo de mediação propõe que a variável independente influencia a variável mediadora, que por sua vez influencia a variável dependente. Assim, a variável mediadora serve para esclarecer a natureza da relação entre as variáveis independentes e dependentes. (pt)
  • В статистике модель медиации стремится идентифицировать и объяснить механизм, лежащий в основе наблюдаемой связи между независимой переменной и зависимой переменной, путем включения третьей гипотетической переменной, известной как переменная-медиатор, или промежуточная переменная. Вместо прямой причинно-следственной связи между независимой и зависимой переменной модель медиации предполагает, что независимая переменная влияет на ненаблюдаемую переменную-медиатор, которая, в свою очередь, влияет на зависимую переменную. Таким образом, переменная-медиатор служит для выяснения характера взаимосвязи между независимыми и зависимыми переменными. (ru)
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