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Violent media content and aggressiveness in adolescents: A negative feedback-loop model
Unformatted Document Text:  A negative feedback-loop model page 12 model was examined and modified to maximize fit. Next, a stabilities model (model A) including paths from the control variables to the six latent factors, and the stability paths (paths from time 1 to time 2 aggressiveness, time 2 to time 3 aggressiveness, time 1 to time 2 violent media content use, and time 2 to time 3 violent media content use) was assessed (see Figure). The next model (model B) freed the paths from Time 1 aggressiveness to Time 2 violent media content use and from Time 2 aggressiveness to Time 3 violent media content use. The final model (model C) freed the paths from time 1 violent media content use to time 2 aggressiveness and from time 2 violent media content use to time 3 aggressiveness. A series of chi-square difference tests was used to examine the result of the series of models (Bentler, 1990). This technique is conceptually equivalent to the use of hierarchical regressions for testing theoretical relationships (Cohen & Cohen, 1983); the significance of improvement in chi-square is tested for each “block” of paths instead of increment to R 2 as in the regression framework. The first step in this study is to compare the chi-square of the model releasing structural paths from one set of latent variables (aggressiveness) to a second set of latent variables (violent media content use) across time to the chi-square of the stability model. A significant chi-square difference indicates that there is a significant effect of aggressiveness on violent media content use beyond the effect of the stability paths. Next, a second model is developed releasing additional structural paths from the second set of latent variables (violent media content use) to the first set of latent variables (aggressiveness) across time. A significant chi-square difference indicates that violent media content use has a significant effect on aggressiveness beyond the stability paths and the effect of aggressiveness on violent

Authors: Slater, Michael., Swaim, Randall. and Anderson, Lori.
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A negative feedback-loop model page 12
model was examined and modified to maximize fit. Next, a stabilities model (model A)
including paths from the control variables to the six latent factors, and the stability paths
(paths from time 1 to time 2 aggressiveness, time 2 to time 3 aggressiveness, time 1 to
time 2 violent media content use, and time 2 to time 3 violent media content use) was
assessed (see Figure). The next model (model B) freed the paths from Time 1
aggressiveness to Time 2 violent media content use and from Time 2 aggressiveness to
Time 3 violent media content use. The final model (model C) freed the paths from time 1
violent media content use to time 2 aggressiveness and from time 2 violent media content
use to time 3 aggressiveness.
A series of chi-square difference tests was used to examine the result of the series
of models (Bentler, 1990). This technique is conceptually equivalent to the use of
hierarchical regressions for testing theoretical relationships (Cohen & Cohen, 1983); the
significance of improvement in chi-square is tested for each “block” of paths instead of
increment to R
2
as in the regression framework. The first step in this study is to compare
the chi-square of the model releasing structural paths from one set of latent variables
(aggressiveness) to a second set of latent variables (violent media content use) across
time to the chi-square of the stability model. A significant chi-square difference indicates
that there is a significant effect of aggressiveness on violent media content use beyond
the effect of the stability paths. Next, a second model is developed releasing additional
structural paths from the second set of latent variables (violent media content use) to the
first set of latent variables (aggressiveness) across time. A significant chi-square
difference indicates that violent media content use has a significant effect on
aggressiveness beyond the stability paths and the effect of aggressiveness on violent


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