Table 2.

Performance on the memory tests for the two instructional groups.

Test/Phase	Interleaved-across-concepts		Blocked-by-concept
	M	SD	M	SD
Fill-in-the-blank test
Retention phase	2.45	1.64	2.33	1.23
True–false test
Instruction phase	5.65	1.33	6.13	1.41
Retention phase	5.65	1.56	5.22	1.46

For both tests, the maximum score is 9.