Table 5.

Multilevel Models for Bidding

	Bout Frequency			Bout Average Duration			Bout Dominance
Fixed Effects	Estimate (SE)		95% CI	Estimate (SE)		95% CI	Estimate (SE)		95% CI
Intercept	7.536 (.516)**		6.524, 8.547	2.780 (.158)**		2.470, 3.091	.180 (.015)**		.151, .210
Linear Slope	4.163 (.877)**		2.443, 5.883	.387 (.211)+		−.027, .802	.128 (.026)*		.077, .179
Quadratic Slope	−.862 (.291)**		−1.433, −.291	−.125 (.061)*		−.245, −.005	−.044 (.009)*		−.062, −.027
Random Effects	SD	Corr.	Corr.	SD	Corr.	Corr.	SD	Corr.	Corr.
Intercept (SD)	1.346			1.370			.051
Linear Slope (SD)	3.498	.848		1.503	−.842		.134	.896
Quadratic Slope (SD)	1.269	−.864	−.916	.354	.710	−.973	.048	−.923	−.997
Residual	5.416			1.034			.153
Model Fit
AIC		2895.963			1510.295			−264.548
BIC		2940.942			1555.274			−219.568
Log Likelihood		−1436.981			−744.147			143.274

Note. N = 120 children, 441 observations;

⁺p < .10,

^*p < .05,

^**p < .01;

SE = Standard Error; SD = Standard Deviation; CI = Confidence Interval.