Row	Measure	Predictor	df	AIC	BIC	logLik	χ2	p
1	features in memory	exponential (locomotion)	5	69392	69433	−34691	—–	—–
2	features in memory	logarithmic (locomotion)	5	69397	69438	−34694	0	1
3	features in memory	linear (locomotion)	5	69358	69399	−34674	39.780	< 0.001
4	features in memory	quadratic (locomotion)	6	69359	69408	−34674	0.448	.503
5	features in memory	cubic (locomotion)	7	69361	69419	−34674	0.052	.820

Each row shows the results from a likelihood ratio procedure comparing each model with the preceding one.

Higher order polynomial fits always included the lower order polynomials.