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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: Early Child Res Q. 2018 Apr 4;46:240–251. doi: 10.1016/j.ecresq.2018.02.005

Table 4.

Final Model Parameters

Mean Level Mean Slope Grade at Point of Maximal Growth
Letter Word Identification
 • Early 416.85 27.01a 5.96
 • Intermediate 411.20 27.01a 6.21
 • Late 406.10 27.01a 6.41
Passage Comprehension
 • Early 446.38 21.53b 6.32
 • Intermediate 441.92 21.53b 6.59
 • Late 440.30 21.53b 6.87
Sound Awareness
 • Early 456.13 11.51 2.88
 • Intermediate 441.90 13.42 2.40
 • Late 454.20 11.59 4.36
Picture Vocabulary
 • Early 477.96 4.27c 3.59d
 • Intermediate 474.44 4.27c 3.59d
 • Late (linear) 459.04 3.48 –

Note. The point of maximal growth references the measurement occasion (fall/spring) of each grade when the group reached their greatest growth. Measurement occasions range from 1 = fall of the first year of preschool to 10 = spring of second grade. Parameters with the same superscript were constrained equal.