Table 1. The various student cohorts and their involvement with the Dimensions of Learning program over the years.

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1994
1995
1996
1997
1998
Number in cohort group
Cohort group 1993
Grade 9 no DOL
Grade 10 no DOL
Grade 11 DOL
Grade 12 DOL
-
51
Cohort group 1994
Grade 8 no DOL
Grade 9 no DOL
Grade 10 DOL
Grade 11 DOL
Grade 12 DOL
103
Cohort group 1995
-
Grade 8 DOL
Grade 9 DOL
Grade 10 DOL
Grade 11 DOL
98
Cohort group 1996
-
-
Grade 8 DOL
Grade 9 DOL
Grade 10 DOL
103
Cohort group 1997
-
-
-
Grade 8 DOL
Grade 9 DOL
97

 

Table 2. The final estimation of the fixed effects

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Fixed Effect

Coefficient
Standard Error
T-ratio
P-value

For INTRCPT1,B0

INTRCPT2,G00

0.370
0.049
7.6
0.000

93,G01

0.333
0.084
4.0
0.000

96,G02

-0.149
0.068
-2.2
0.028

IQ,G03

0.028
0.002
11.8
0.000

For GRADE LEVEL slope, B1

INTRCPT2,G10

0.263
0.031
8.6
0.000

DOL1, G11

-0.018
0.037
-0.5
0.624

For DOL slope, B2

INTRCPT2,G20

0.106
0.059
1.8
0.036 a

IQ, G21

0.0055
0.003
2.0
0.043
a a one-tailed test of significance is employed as hypothesised

 

 

Table 3. Final estimation of variance components

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Random Effect

 

Standard Deviation

 

Variance Component

 

df

 

Chi-square

 

P-value

INTRCPT1, U0

0.292
0.085
95
115.7
0.074

GRADE LEVEL slope,U1

0.025
0.001
97
87.6
>.500

DOL slope, U2

0.220
0.048
97
77.3
>.500

level-1, R

0.475
0.227

 

 

 

 

Table 4. Estimated variance components for the null model

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Random Effect

Standard Deviation
Variance Component
df
Chi-square
P-value

INTRCPT1, U0

0.737
0.543
451
2528
0.000

level-1, R

0.574
0.329