title: multiple mediation effect; data: file is C:\Users\mike1\Desktop\data\沐守宽老师数据\data.csv; variable: names are X Y Z M; usevariables are X Y Z M; analysis: type = general; estimator = ML; bootstrap = 1000; ! 这三行语句是比较固定的。 model: Y on X(b1) Z(b2) M(b3); Z on X(a1); M on X(a2); !注意必须分行写，否则无法识别路径系数的别名 model constraint: new(totalind total); ! 用于生成新的用于估计的变量。 totalind = a1*b1 + a2*b2; total = a1*b1 + a2*b2 + b3; output: standardized cinterval(bcbootstrap); savedata: file is C:\Users\mike1\Desktop\data\Mplus\mydata1;
总结： y on x(b1) m(b2); 这样写是无法估计路径系数的，必须分行写 y on x(b1)
m(b2);
图形如下：
结果如下：
Mplus VERSION 7 MUTHEN & MUTHEN 04/15/2020 2:38 PM INPUT INSTRUCTIONS title: multiple mediation effect; data: file is C:\Users\mike1\Desktop\data\沐守宽老师数据\data.csv; variable: names are X Y Z M; usevariables are X Y Z M; analysis: type = general; estimator = ML; bootstrap = 1000; model: Y on X(b1) Z(b2) M(b3); Z on X(a1); M on X(a2); model constraint: new(totalind total); totalind = a1*b1 + a2*b2; total = a1*b1 + a2*b2 + b3; output: standardized cinterval(bcbootstrap); savedata: file is C:\Users\mike1\Desktop\data\Mplus\mydata1; INPUT READING TERMINATED NORMALLY multiple mediation effect; SUMMARY OF ANALYSIS Number of groups 1 Number of observations 100 Number of dependent variables 3 Number of independent variables 1 Number of continuous latent variables 0 Observed dependent variables Continuous Y Z M Observed independent variables X Estimator ML Information matrix OBSERVED Maximum number of iterations 1000 Convergence criterion 0.500D-04 Maximum number of steepest descent iterations 20 Number of bootstrap draws Requested 1000 Completed 1000 Input data file(s) C:\Users\mike1\Desktop\data\沐守宽老师数据\data.csv Input data format FREE THE MODEL ESTIMATION TERMINATED NORMALLY MODEL FIT INFORMATION Number of Free Parameters 11 Loglikelihood H0 Value -545.775 H1 Value -544.933 Information Criteria Akaike (AIC) 1113.550 Bayesian (BIC) 1142.207 Sample-Size Adjusted BIC 1107.466 (n* = (n + 2) / 24) Chi-Square Test of Model Fit Value 1.684 Degrees of Freedom 1 P-Value 0.1944 RMSEA (Root Mean Square Error Of Approximation) Estimate 0.083 90 Percent C.I. 0.000 0.294 Probability RMSEA <= .05 0.249 CFI/TLI CFI 0.975 TLI 0.849 Chi-Square Test of Model Fit for the Baseline Model Value 33.115 Degrees of Freedom 6 P-Value 0.0000 SRMR (Standardized Root Mean Square Residual) Value 0.034 MODEL RESULTS Two-Tailed Estimate S.E. Est./S.E. P-Value Y ON X 0.168 0.148 1.135 0.256 Z 0.215 0.143 1.498 0.134 M 0.211 0.107 1.975 0.048 Z ON X 0.182 0.119 1.531 0.126 M ON X 0.386 0.108 3.584 0.000 Intercepts Y 1.867 0.987 1.891 0.059 Z 4.310 0.606 7.114 0.000 M 2.873 0.564 5.094 0.000 Residual Variances Y 2.214 0.331 6.687 0.000 Z 2.061 0.318 6.479 0.000 M 2.420 0.334 7.248 0.000 New/Additional Parameters TOTALIND 0.113 0.063 1.808 0.071 TOTAL 0.325 0.110 2.940 0.003 STANDARDIZED MODEL RESULTS StdYX StdY Std Estimate Estimate Estimate Y ON X 0.148 0.104 0.168 Z 0.195 0.195 0.215 M 0.217 0.217 0.211 Z ON X 0.177 0.124 0.182 M ON X 0.333 0.234 0.386 Intercepts Y 1.161 1.161 1.867 Z 2.955 2.955 4.310 M 1.741 1.741 2.873 Residual Variances Y 0.856 0.856 2.214 Z 0.969 0.969 2.061 M 0.889 0.889 2.420 R-SQUARE Observed Variable Estimate Y 0.144 Z 0.031 M 0.111 CONFIDENCE INTERVALS OF MODEL RESULTS Lower .5% Lower 2.5% Lower 5% Estimate Upper 5% Upper 2.5% Upper .5% Y ON X -0.228 -0.144 -0.111 0.168 0.395 0.442 0.524 Z -0.201 -0.095 -0.043 0.215 0.441 0.476 0.543 M -0.045 0.025 0.049 0.211 0.394 0.439 0.513 Z ON X -0.135 -0.064 -0.016 0.182 0.369 0.405 0.460 M ON X 0.103 0.168 0.211 0.386 0.556 0.590 0.675 Intercepts Y -0.554 -0.087 0.209 1.867 3.505 3.808 4.259 Z 2.843 3.105 3.295 4.310 5.260 5.560 5.867 M 1.374 1.726 1.952 2.873 3.779 3.990 4.366 Residual Variances Y 1.516 1.690 1.794 2.214 2.887 2.976 3.163 Z 1.417 1.526 1.612 2.061 2.707 2.806 2.940 M 1.633 1.862 1.931 2.420 3.073 3.201 3.483 New/Additional Parameters TOTALIND -0.055 0.001 0.023 0.113 0.227 0.246 0.278 TOTAL 0.027 0.117 0.155 0.325 0.512 0.556 0.630 SAVEDATA INFORMATION Save file C:\Users\mike1\Desktop\data\Mplus\mydata1 Order and format of variables Y F10.3 Z F10.3 M F10.3 X F10.3 Save file format 4F10.3 Save file record length 10000 DIAGRAM INFORMATION Use View Diagram under the Diagram menu in the Mplus Editor to view the diagram. If running Mplus from the Mplus Diagrammer, the diagram opens automatically. Diagram output c:usersmike1desktopdatamplusmultiple mediation.dgm Beginning Time: 14:38:55 Ending Time: 14:38:57 Elapsed Time: 00:00:02 MUTHEN & MUTHEN 3463 Stoner Ave. Los Angeles, CA 90066 Tel: (310) 391-9971 Fax: (310) 391-8971 Web: www.StatModel.com Support: Support@StatModel.com Copyright (c) 1998-2012 Muthen & Muthen