The formula for the population standard deviation is 
Definitions:
Neural Processing
The method by which the nervous system receives, interprets, and responds to internal and external stimuli through the activity of neurons.
Dyslexia
A learning disorder characterized by difficulties in reading due to problems identifying speech sounds and learning how they relate to letters and words.
Brain Development
The process of growth and maturation of the brain, involving changes in structure, function, and complexity, crucial for cognitive, motor, and emotional abilities.
Specific Learning Disability
A disorder in one or more of the basic psychological processes involved in understanding or using spoken or written language.
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