Congrats!
The PSI is still well within the average range, so I wouldn't be too concerned about it, in the absence of any functional impairments. There are numerous possible explanations for a relative weakness in the PSI, including a careful, conscientious task approach, perfectionism, age-appropriate fine-motor skills in the context of well above average cognition, true fine-motor deficits, unfamiliarity with timed tasks, inattention, fatigue, medication side effects, mental fog from allergies or illness...
Unless you see inconsistencies or problems in real life, I wouldn't worry too much that the average PSI is concerning. Is she actually slow in completing tasks, or responding?
