Previous Diagnosis ADHD

It is estimated that between 5% and 8% of the general population of children qualify as having Attention Deficit Hyperactivity Disorder (ADHD). Hyperactivity, inattentiveness, and/or impulsiveness are the main characteristics. Lindamood-Bell Learning Center students who reported having previous, third- party diagnoses of ADHD, on average, received instruction that was fairly evenly split between the Seeing Stars® program for decoding, and the Visualizing and Verbalizing® program for comprehension – or a combination of the two.

In 2011, Lindamood-Bell Learning Centers worked with 613 students who reported having previous, third-party diagnoses of ADHD. That is 23% of the total student population in our Learning Centers. Before starting instruction, on average, these students tested below the 45th percentile in the following categories of the Lindamood-Bell learning ability evaluation: symbol imagery, phonemic awareness, word attack, and comprehension.

After completing instruction, these students achieved the following average gains:

• Symbol Imagery: from the 30th to the 61st Percentile – a 31-point gain. In terms of Standard Scores, this equates to a growth of 12.6 points. Note that, with Standard Scores, any change over 4.5 points is considered “large.”

• Phonemic Awareness: from the 27th to the 50th Percentile – a 23-point gain. In terms of Standard Scores, this equates to a growth of 9.0 points. Note that, with Standard Scores, any change over 4.5 points is considered “large.”

• Word Attack: from the 45th to the 68th Percentile – a 23-point gain. In terms of Standard Scores, this equates to a growth of 8.2 points. Note that, with Standard Scores, any change over 4.5 points is considered “large.”

• Comprehension: from the 30th to the 47th Percentile – a 17-point gain. In terms of Standard Scores, this equates to a growth of 7.6 points. Note that, with Standard Scores, any change over 4.5 points is considered “large.”