Table B.5.

Fit statistics of the teacher/class heterogeneity-homogeneity models for enjoyment and self-perceived ability at age 9 for same- vs. different-teacher/class twin pairs at age 9.

		6 parameters model		3 parameters model		Homogeneity model
		AIC	BIC	AIC	BIC	χ2
English	Enjoyment	4866.354	−41027.20	4865.178	−41050.85	χ2 > .19
	Self-perceived ability	4888.890	−41161.99	4883.591	−41189.76	χ2 > .87
Maths	Enjoyment	4939.787	−40893.83	4934.389	−40921.70	χ2 > .89
	Self-perceived ability	4968.001	−41045.42	4962.815	−41073.08	χ2 > .85
Science	Enjoyment	4939.577	−40804.14	4937.640	−40828.56	χ2 > .25
	Self-perceived ability	4958.279	−41017.68	4952.657	−41045.78	χ2 > .94

Note. The best fitting model equated the ACE parameters for same- and different-teacher/class (Homogeneity model).