Table 2.
Model Fit Statistics for the Different Tested Models
| Model name | −2LL | χ2 | df | p | CFI | NNFI | RMSEA | RMSEA L | RMSEA U | RMSEA p | AIC | BIC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Saturated model | 4,178.45 | — | — | — | — | — | — | — | — | — | 4,266.45 | 4,381.51 |
| 2. No direct effect | 4,182.07 | 3.62 | 1 | .057 | 0.95 | −0.31 | .16 | .00 | .35 | .089 | 4,268.07 | 4,380.52 |
| 3. Role of AC removed | 4,190.64 | 12.19 | 2 | .002 | 0.82 | −1.55 | .23 | .12 | .35 | .007 | 4,274.64 | 4,384.48 |
| 4. Role of DC removed | 4,178.96 | 0.51 | 2 | .776 | 1.00 | 1.37 | .00 | .00 | .13 | .821 | 4,262.96 | 4,372.79 |
| 5. Role of temp removed | 4,183.60 | 5.16 | 2 | .076 | 0.94 | 0.21 | .13 | .00 | .26 | .127 | 4,267.60 | 4,377.44 |
| 6. Roles of both DC and temp removed | 4,184.38 | 5.93 | 4 | .205 | 0.97 | 0.76 | .07 | .00 | .18 | .318 | 4,264.38 | 4,368.98 |
| 7. Drop moderation | 4,188.52 | 10.07 | 5 | .073 | 0.91 | 0.49 | .10 | .00 | .19 | .152 | 4,266.52 | 4,368.51 |
| 8. Final model | 4,199.00 | 20.55 | 18 | .303 | 0.95 | 0.93 | .04 | .00 | .10 | .568 | 4,251.00 | 4,318.99 |
AC is blood pulse amplitude increase. DC is blood volume increase. Temp is cheek temperature increase. AC = alternating current; DC = direct current; CFI = comparative fit index; NNFI = Non‐Normed Fit Index; RMSEA = root mean square error of approximation; AIC = Akaike information criterion; BIC = Bayesian information criterion.