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Table 3 Null models

From: A mixed-methods study of physiological reactivity to domain-specific problem solving: methodological perspectives for process-accompanying research in VET

Parameter

Model 1: HR

Model 2: RMSSD

Model 3: LF/HF ratio

Model 4: SCL

Model 5: SCR

Estimate

S.E.

p

Estimate

S.E.

p

Estimate

S.E.

p

Estimate

S.E.

p

Estimate

S.E.

p

Fixed effects

 Intercept

.058

.168

.734

.090

.211

.675

−.013

.116

.914

.001

.219

.998

−.004

.108

.968

Random effects

 Residual variance (σ 2e )

.586

.015

<.001

.422

.011

<.001

.765

.020

<.001

.172

.004

<.001

.797

.027

<.001

 Random intercept variance (σ 2u )

.501

.174

.004

.799

.276

.004

.238

.083

.004

.861

.296

.004

.200

.071

.005

ICC

.461

.654

.237

.834

.200

n (10-s intervals)

3076

3075

3075

3226

1792