Table 4.

Results of Fitting Unconditional Latent Growth Curve Models for Quadratic Individual Change in Heart Rate and Systolic Blood Pressure

Variable	Parameter	Outcome
		Heart Rate	Systolic Blood Pressure
Fixed effects
Initial status	μπ0	72.42***	125.24***
Linear rate of change	μπ1	14.66***	16.86***
Quadratic rate of change	μπ2	−3.48***	−3.59***
Variance components
Level 1
Baseline	σ2ε1	16.64	−3.07
Preparation	σ2ε2	56.78***	119.80***
Speech	σ2ε3	91.84***	185.12***
Math	σ2ε4	71.11***	155.64***
Recovery	σ2ε5	41.65***	97.45***
Level 2
Initial status	σ2π0	144.43***	356.52***
Linear rate of change	σ2π1	135.63***	239.51***
Quadratic rate of change	σ2π2	6.82***	10.28***
Initial status × Linear rate of change	σ2π01	−15.44	−40.55
Initial status × Quadratic rate of change	σ2π02	2.33	3.25
Linear rate of change × Quadratic rate of change	σ2π12	−30.14***	−48.66***
Goodness-of-fit
χ2 (df = 6)		32.92***	22.46**
CFI		0.98	0.98
RMSEA		0.07	0.05
SRMR		0.02	0.05

Note:

^**p <.01

^***P<.001