Table 7.

Fixed Effects From the Cross-Classified, Growth-Curve Model on the Grade at Which Students Were in ISI Intervention Classrooms for Reading Score (z score)

Predictor	b	b SE	t(880)	p
For Intercept 1, π0
TTT, γ01	0.497	0.093	5.319	<.001
TTC, γ02	0.529	0.075	7.022	<.001
TCC, γ03	0.511	0.058	8.827	<.001
CCC, γ04	0.318	0.041	7.658	<.001
TCT, γ05	0.514	0.103	4.997	<.001
CTC, γ06	0.271	0.054	4.983	<.001
CCT, γ07	0.271	0.053	5.045	<.001
CTT, γ08	0.539	0.077	7.006	<.001
For Time, π1
TTT, γ11	0.035	0.005	6.717	<.001
TTC, γ12	0.027	0.004	6.336	<.001
TCC, γ13	0.038	0.003	11.302	<.001
CCC, γ14	0.041	0.003	13.916	<.001
TCT, γ15	0.034	0.005	5.962	<.001
CTC, γ16	0.053	0.004	14.170	<.001
CCT, γ17	0.036	0.004	8.569	<.001
CTT, γ18	0.043	0.005	8.801	<.001
For Time2, π2
TTT, γ21	−0.001	0.0003	−3.593	<.001
TTC, γ22	−0.0006	0.0003	−2.354	.019
TCC, γ23	−0.001	0.0002	−4.883	<.001
CCC, γ24	−0.0009	0.0002	−5.114	<.001
TCT, γ25	−0.001	0.0004	−2.972	.003
CTC, γ26	−0.002	0.0003	−7.590	<.001
CCT, γ27	−0.0007	0.0002	−3.175	.002
CTT, γ28	−0.002	0.0003	−6.182	<.001
For Time3, π3
TTT, γ31	0.0002	0.00002	8.417	<.001
TTC, γ32	0.0002	0.00002	11.726	<.001
TCC, γ33	0.0001	0.00001	10.782	<.001
CCC, γ34	0.0001	0.00001	10.772	<.001
TCT, γ35	0.0002	0.00002	7.944	<.001
CTC, γ36	0.00009	0.00002	5.757	<.001
CCT, γ37	0.0002	0.00002	10.430	<.001
CTT, γ38	0.0001	0.00002	6.478	<.001

Note: Deviance = 4,781.377294. In group names, the letters (T = treatment, C = control) indicate the order in which the treatments were received from first grade through third grade. Time is in months and is centered at the end of second grade. Time² represents the quadratic trend, and Time³ represents the cubic trend. Intercepts were removed from the model so all groups could be modeled. Thus, intercepts represent end-of-second-grade means for each group. ISI = Individualizing Student Instruction.