Table 2.

Mean (SD) demographics of improvement group. Skill group was determined using the Phonemic Decoding subtest of the Test of Word Reading Efficiency. IQ was measured by the full-scale IQ index from the Wechsler’s Abbreviated Scale of Intelligence. Improvement groups start out equivalent at T1, but high improvers score significantly higher than their low improving counterparts at T2. Both groups performed well on the in-scanner rhyme judgment task at both times. Both groups improved similarly on task performance over time.

	Age at T1	IQ	Phonemic Decoding Efficiency Raw Score			Sight Word Efficiency Raw Score			In-Scanner Task Accuracy
			T1	T2	Change	T1	T2	Change	T1	T2
Low	11.3 (1.4)	116.6 (13.1)	42.3 (10.9)	41.3 (9.5)	−1.0 (4.9)	75.6 (9.3)	81.6 (8.9)	6.0 (5.8)	85.2 (0.1)	90.5 (0.1)
High	11.1 (1.7)	116.7 (12.7)	42.4 (10.5)	49.5 (6.5)	7.1 (5.3)	76.9 (11.0)	86.7 (8.9)	9.8 (7.6)	86.0 (0.1)	91.0 (0.1)