# 中介變數

1. 用迴歸分析睇吓 ${\displaystyle X}$ 係咪能夠預測 ${\displaystyle Y}$；即係睇吓 ${\displaystyle Y=\beta _{10}+\beta _{11}X+\varepsilon _{1}}$ 當中嘅 ${\displaystyle \beta _{11}}$ 係咪顯著
2. 用迴歸分析睇吓 ${\displaystyle X}$ 係咪能夠預測 ${\displaystyle Me}$；即係睇吓 ${\displaystyle Me=\beta _{20}+\beta _{21}X+\varepsilon _{2}}$ 當中嘅 ${\displaystyle \beta _{21}}$ 係咪顯著
3. 用迴歸分析睇吓 ${\displaystyle X}$${\displaystyle Me}$ 係咪能夠預測 ${\displaystyle Y}$；即係睇吓 ${\displaystyle Y=\beta _{30}+\beta _{31}X+\beta _{32}Me+\varepsilon _{3}}$ 當中嘅 ${\displaystyle \beta _{32}}$ 係咪顯著，以及 ${\displaystyle \beta _{31}}$絕對值係咪細過 ${\displaystyle \beta _{11}}$

## 攷

1. MacKinnon, D. P. (2008). Introduction to Statistical Mediation Analysis. New York: Erlbaum.
2. Baron, R. M. and Kenny, D. A. (1986) "The Moderator-Mediator Variable Distinction in Social Psychological Research – Conceptual, Strategic, and Statistical Considerations", Journal of Personality and Social Psychology, Vol. 51(6), pp. 1173–1182.
3. Tofighi, D., & Thoemmes, F. (2014). Single-level and multilevel mediation analysis (PDF). The Journal of Early Adolescence, 34(1), 93-119.