PA 765: AMOS Output for Structural Equation Modeling
Structural Equation Modeling Example
Using WinAMOS
The Wheaton Study
SEM is capable of a wide variety of output, as for assessing regression models, factor models, ANCOVA models, bootsrapping,
and more. This particular output uses the Windows PC version of AMOS (WinAmos 3.51) for an example provided with the
package, Wheaton's longitudinal study of social alienation. As such it treats regression with time-dependent data which may
involve autocorrelation. (See B. Wheaton et al., "Assessing reliability and stability in panel models," pp. 84-136 in David R.
Heise et al., Sociological Methodology 1977, San Francisco: Jossey-Bass, 1977).
The Wheaton study dealt with three latent variables, each measured by two indicators. Alienation67 was measured by anomia67
(a 1967 score on an anomia scale) and powles67 (a 1967 score on a powerlessness scale). Alienation71 was the same, but for two
corresponding scales given in 1971. The third latent variable, SES (socio-economic status) was measured by education (years of
schooling as of 1967) and SEI (Duncan's Socioeconomic Index, as of 1967).
WinAmos may be run in either text or graphics mode. The discussion below assumes that WinAmos has been launched in the
graphics mode.
SEM Steps
1. Loading in the data. WinAMOS provides the Wheaton dataset in the file ex06-a.amw. Use File, Open, and select this
file. In graphics mode the file will come up as below. Although pre-defined here, the graphics mode allows the researcher
to create new models graphically, by adding circles for variables, arrows, and other elements you see below.
In addition to the model, the Amos toolbar is show on the right-hand side of the window.
http://www2.chass.ncsu.edu/garson/PA765/semAMOS1.htm (1 of 9)2006-6-28 9:44:20
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