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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 15 content use beyond the effects of the control variables, consistent with the selective exposure mechanism posited in Hypothesis 1. The final model (C) tested the effects of violent media content use on aggressiveness, over and above the effects of control variables, stability paths, and the selective exposure paths. This model, then, added paths from time 1 violent media content use to time 2 aggressiveness and from time 2 violent media content use to time 3 aggressiveness. Compared to model B, the fit was significantly improved ( 2 (2) = 8.60, p < .05, see Table 1), indicating that violent media content use significantly predicts increased aggressiveness over and above the effects of the control variables and the effects of aggressiveness on violent media content use, consistent with Hypothesis 2. --Table 1 about here-- Standardized path coefficients for the final structural model (model C) are illustrated in Figure 1. (Paths from control variables and correlations among error and disturbance terms are not illustrated for the sake of readability.) The predicted path coefficients are statistically significant in all but one case. The selective exposure path from aggressiveness to violent media content use is not statistically significant from Time 1 to Time 2. --Figure 1 about here-- Post Hoc Analyses Several additional analyses were conducted to provide greater insight into variable relationships. We examined specific effects for evidence that a particular medium impacted aggressiveness above and beyond the effects of the composite measure (Newcomb, et al., 1993). This test is based on significant paths from the error term for

Authors: Slater, Michael., Swaim, Randall. and Anderson, Lori.
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A negative feedback-loop model page 15
content use beyond the effects of the control variables, consistent with the selective
exposure mechanism posited in Hypothesis 1.
The final model (C) tested the effects of violent media content use on
aggressiveness, over and above the effects of control variables, stability paths, and the
selective exposure paths. This model, then, added paths from time 1 violent media
content use to time 2 aggressiveness and from time 2 violent media content use to time 3
aggressiveness. Compared to model B, the fit was significantly improved (
2
(2) =
8.60, p < .05, see Table 1), indicating that violent media content use significantly predicts
increased aggressiveness over and above the effects of the control variables and the
effects of aggressiveness on violent media content use, consistent with Hypothesis 2.
--Table 1 about here--
Standardized path coefficients for the final structural model (model C) are
illustrated in Figure 1. (Paths from control variables and correlations among error and
disturbance terms are not illustrated for the sake of readability.) The predicted path
coefficients are statistically significant in all but one case. The selective exposure path
from aggressiveness to violent media content use is not statistically significant from Time
1 to Time 2.
--Figure 1 about here--
Post Hoc Analyses
Several additional analyses were conducted to provide greater insight into
variable relationships. We examined specific effects for evidence that a particular
medium impacted aggressiveness above and beyond the effects of the composite measure
(Newcomb, et al., 1993). This test is based on significant paths from the error term for


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