This study compares various methods of mediations analysis. Firstly, it compares the two methods of calculating indirect effect which are product of coefficient and difference of coefficients respectively. Secondly, the study compares the three methods of testing the significance of indirect effect vis avis Sobel’s test, Aroian test and Goodman’s test. The differences in these three tests are due to variations in the methods of standard error computation. The findings are discussed. The results show that both methods of product of coefficients and difference of coefficients give approximately the same result. However the product of coefficient gave a slightly higher result. The comparison of test of indirect effect for mediator shows that the tests gave the same result for Sobel’s, Aroian and Goodman test. The study recommended further studies to seek methods of ascertaining the direction of relationship of indirect effect, other than those of the regression models, further studies may be carried out to determine the effect of multicolinearity on mediation results.
| Published in | American Journal of Theoretical and Applied Statistics (Volume 5, Issue 2) |
| DOI | 10.11648/j.ajtas.20160502.14 |
| Page(s) | 64-69 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2016. Published by Science Publishing Group |
Mediation, Sobels Test, Aroian Test, Goodman Test, Indirect Effect
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APA Style
Chike Henry Nwankwo, Amechi Henry Igweze. (2016). Comparison of Tests of Indirect Effect in Single Mediation Analysis. American Journal of Theoretical and Applied Statistics, 5(2), 64-69. https://doi.org/10.11648/j.ajtas.20160502.14
ACS Style
Chike Henry Nwankwo; Amechi Henry Igweze. Comparison of Tests of Indirect Effect in Single Mediation Analysis. Am. J. Theor. Appl. Stat. 2016, 5(2), 64-69. doi: 10.11648/j.ajtas.20160502.14
AMA Style
Chike Henry Nwankwo, Amechi Henry Igweze. Comparison of Tests of Indirect Effect in Single Mediation Analysis. Am J Theor Appl Stat. 2016;5(2):64-69. doi: 10.11648/j.ajtas.20160502.14
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Download@article{10.11648/j.ajtas.20160502.14,
author = {Chike Henry Nwankwo and Amechi Henry Igweze},
title = {Comparison of Tests of Indirect Effect in Single Mediation Analysis},
journal = {American Journal of Theoretical and Applied Statistics},
volume = {5},
number = {2},
pages = {64-69},
doi = {10.11648/j.ajtas.20160502.14},
url = {https://doi.org/10.11648/j.ajtas.20160502.14},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtas.20160502.14},
abstract = {This study compares various methods of mediations analysis. Firstly, it compares the two methods of calculating indirect effect which are product of coefficient and difference of coefficients respectively. Secondly, the study compares the three methods of testing the significance of indirect effect vis avis Sobel’s test, Aroian test and Goodman’s test. The differences in these three tests are due to variations in the methods of standard error computation. The findings are discussed. The results show that both methods of product of coefficients and difference of coefficients give approximately the same result. However the product of coefficient gave a slightly higher result. The comparison of test of indirect effect for mediator shows that the tests gave the same result for Sobel’s, Aroian and Goodman test. The study recommended further studies to seek methods of ascertaining the direction of relationship of indirect effect, other than those of the regression models, further studies may be carried out to determine the effect of multicolinearity on mediation results.},
year = {2016}
}
TY - JOUR T1 - Comparison of Tests of Indirect Effect in Single Mediation Analysis AU - Chike Henry Nwankwo AU - Amechi Henry Igweze Y1 - 2016/03/18 PY - 2016 N1 - https://doi.org/10.11648/j.ajtas.20160502.14 DO - 10.11648/j.ajtas.20160502.14 T2 - American Journal of Theoretical and Applied Statistics JF - American Journal of Theoretical and Applied Statistics JO - American Journal of Theoretical and Applied Statistics SP - 64 EP - 69 PB - Science Publishing Group SN - 2326-9006 UR - https://doi.org/10.11648/j.ajtas.20160502.14 AB - This study compares various methods of mediations analysis. Firstly, it compares the two methods of calculating indirect effect which are product of coefficient and difference of coefficients respectively. Secondly, the study compares the three methods of testing the significance of indirect effect vis avis Sobel’s test, Aroian test and Goodman’s test. The differences in these three tests are due to variations in the methods of standard error computation. The findings are discussed. The results show that both methods of product of coefficients and difference of coefficients give approximately the same result. However the product of coefficient gave a slightly higher result. The comparison of test of indirect effect for mediator shows that the tests gave the same result for Sobel’s, Aroian and Goodman test. The study recommended further studies to seek methods of ascertaining the direction of relationship of indirect effect, other than those of the regression models, further studies may be carried out to determine the effect of multicolinearity on mediation results. VL - 5 IS - 2 ER -
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