The solution of fixed effects and type II test of fixed effects from the final model (Model 3) is shown below. The reference was set as baseline and DASS_anxiety is the mediator. Solutions for Fixed Effects Effect Condition time Estimate Standard Error DF t Value Pr > |t| Intercept 4.9622 0.121 667 41.01 <.0001 cond 1, control -0.057 0.1681 667 -0.34 0.7347 cond 2, experimental 0 . . . . time 1 month -0.5048 0.1092 1691 -4.62 <.0001 time 3 month -0.6054 0.127 1691 -4.77 <.0001 time 6 month -0.8472 0.1357 1691 -6.24 <.0001 time Baseline (reference group) 0 . . . . cond*time 1, control 1 month 0.2916 0.1501 1691 1.94 0.0522 cond*time 1, control 3 month 0.1661 0.1754 1691 0.95 0.3437 cond*time 1, control 6 month 0.5023 0.1857 1691 2.71 0.0069 cond*time 1, control Baseline (reference group) 0 . . . . cond*time 2, experimental 1 month 0 . . . . cond*time 2, experimental 3 month 0 . . . . cond*time 2, experimental 6 month 0 . . . . cond*time 2, experimental Baseline (reference group) 0 . . . . DASS_ANXIETY 0.03509 0.008233 1691 4.26 <.0001 DASS_ANXIETY*cond 1, control 0.0177 0.01172 1691 1.51 0.131 DASS_ANXIETY*cond 2, experimental 0 . . . . DASS_ANXIETY*time 1 month 0.01697 0.009498 1691 1.79 0.0741 DASS_ANXIETY*time 3 month 0.01906 0.01159 1691 1.64 0.1004 DASS_ANXIETY*time 6 month 0.02687 0.01274 1691 2.11 0.0352 DASS_ANXIETY*time Baseline (reference group) 0 . . . . DASS_ANXIE*cond*time 1, control 1 month -0.01377 0.01297 1691 -1.06 0.2886 DASS_ANXIE*cond*time 1, control 3 month -0.01029 0.01591 1691 -0.65 0.5178 DASS_ANXIE*cond*time 1, control 6 month -0.02023 0.01675 1691 -1.21 0.2274 DASS_ANXIE*cond*time 1, control Baseline (reference group) 0 . . . . DASS_ANXIE*cond*time 2, experimental 1 month 0 . . . . DASS_ANXIE*cond*time 2, experimental 3 month 0 . . . . DASS_ANXIE*cond*time 2, experimental 6 month 0 . . . . DASS_ANXIE*cond*time 2, experimental Baseline (reference group) 0 . . . . Type III Tests of Fixed Effects Effect Num DF Den DF F Value Pr > F cond 1 667 1.57 0.2105 time 3 1691 17.53 <.0001 cond*time 3 1691 2.89 0.0344 DASS_ANXIETY 1 1691 134.49 <.0001 DASS_ANXIETY*cond 1 1691 0.5 0.4776 DASS_ANXIETY*time 3 1691 1.73 0.1581 DASS_ANXIE*cond*time 3 1691 0.62 0.6036 Based on my understanding, if the type II tests of fixed effects for mediator*time is significant then mediation is present. The solution vectors are shown in solution for fixed effects, but for the life of me I can not figure out how best to present this finding or figure out a way to find direct/indirect effects.
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