**AMOS** is statistical software and it stands for analysis of a moment structures. AMOS is an added SPSS module, and is specially used for Structural Equation Modeling, path analysis, and confirmatory factor analysis. It is also known as analysis of covariance or causal modeling software. AMOS is a visual program for structural equation modeling (SEM). In AMOS, we can draw models graphically using simple drawing tools. AMOS quickly performs the computations for SEM and displays the results.

**In the calculation of SEM coefficients, AMOS uses the following methods:**

- Maximum likelihood
- Unweighted least squares
- Generalized least squares
- Browne’s asymptotically distribution-free criterion
- Scale-free least squares

Amos is a powerful structural equation modeling (SEM) software helping support your research and theories by extending standard multivariate analysis methods, including regression, factor analysis, correlation and analysis of variance. Build attitudinal and behavioral models reflecting complex relationships more accurately than with standard multivariate statistics techniques using either an intuitive graphical or programmatic user interface. Amos is included in the Premium edition of SPSS Statistics (except in Campus Edition, where it is sold separately). You can also buy Amos as part of the Base, Standard and Professional editions of SPSS Statistics, or separately as a stand-alone application. For Windows only.

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