Models | Parameters | Coefficients | Z value | Goodness-of-fit indices |
---|---|---|---|---|
Measurement models |  |  |  | χ2(1) = 35.1, P < 0.001, CFI = 0.99, TLI = 0.98, SRMR = 0.01; RMSEA = 0.06 (0.04–0.08) |
Trajectory of PP | Intercept | 55.13a | 357.75 | |
Slope | − 0.07 | − 0.91 | ||
Trajectory of cognitive score | Intercept | 10.48a | 241.29 | χ2(1) = 91.6, P < 0.001, CFI = 0.99, TLI = 0.97, SRMR = 0.02; RMSEA = 0.09 (0.08–0.10) |
Slope | − 0.28a | − 13.91 | ||
Structural models | Â | Â | Â | Â |
Unconditional model | PP intercept → cog intercept | − 0.25a | 17.28 | χ2(8) = 125.8, P < 0.001, CFI = 0.99, TLI = 0.99, SRMR = 0.02; RMSEA = 0.04 (0.03–0.05) |
PP intercept → cog slope | − 0.16a | − 3.53 | ||
PP slope → cog slope | − 0.06 | − 0.66 | ||
Conditional modelb | PP intercept → cog intercept | − 0.04a | − 2.56 | χ2(68) = 285.5, P < 0.001, CFI = 0.99, TLI = 0.98, SRMR = 0.01; RMSEA = 0.02 (0.02–0.02) |
PP intercept → cog slope | − 0.10 | − 1.34 | ||
PP slope → cog slope | − 0.07 | − 0.63 |