Table 4.

Post-hoc paired sample t-test (Grade 3 and 4).

Computational concepts	Grade	N	BCTt	Mean	SD	Sig. (2-tailed)	Cohen's d
Sequences	3	20	Pre + post	0.050	0.203	0.285	0.246
	4	21	Pre + post	0.024	0.096	0.267	0.249
Simple loops	3	20	Pre + post	0.000	0.092	1.000	0.000
	4	21	Pre + post	0.000	0.167	1.000	0.000
Nested loops	3	20	Pre + post	0.071	0.276	0.262	0.259
	4	21	Pre + post	0.068	0.195	0.125	0.349
If-then conditionals	3	20	Pre + post	0.125	0.393	0.171	0.318
	4	21	Pre + post	0.071	0.327	0.329	0.218
If-then-else conditionals	3	20	Pre + post	0.325	0.406	0.002	0.800
	4	21	Pre + post	0.071	0.427	0.452	0.167
While conditionals	3	20	Pre + post	0.083	0.322	0.262	0.259
	4	21	Pre + post	0.127	0.324	0.088	0.391
Total	3	20	Pre + post	1.950	2.800	0.006	0.696
	4	21	Pre + post	1.000	1.949	0.029	0.513