These are observations by a psychologist in Tustin, California , Dr. Stanley H. Walters, which I got at a parent support group meeting decades ago. In girls, the cognitive learning style is often visual-spacial instead of auditory.
Hyperactivity is usually goal-directed.
The girls in the sample tended to be unusually strong. Difficulty in learning to read write and spell. Often they do not respond to cultural systems of discipline. Yelling, spanking, take away, and anger in voice, makes them worse. Difficulties with peers.