Table 1.

Descriptive statistics for performance measures (n = 49).

	Minimum	Maximum	Mean (SD)
Raven’s Progressive Matrices	4.00	35.00	15.86 (8.88)
MLU-baseline	1.06	7.06	3.46 (1.57)
MLU-practice	1.00	7.50	3.57 (1.42)
NDW	8.00	156.00	38.92 (32.22)
NAP total (max 12)	0.00	11.00	5.25 (2.89)
Utterances in practice	3.00	65.00	17.18 (11.95)
Prompts in practice	4.00	35.00	14.96 (6.82)
Utterances per prompt	0.32	5.91	1.37 (1.16)
MLU-interview	1.27	7.35	3.00 (1.52)

Note. MLU = mean length of utterance; NAP = Narrative Assessment Profile; NDW = number of different words used.