Psychology Unplugged Processing Speed Disorder
Feb 22, 2026
A deep dive into processing speed as a neural efficiency separate from intelligence. Brain wiring, myelination, and testing methods are explained. Practical classroom and workplace impacts get attention, plus accommodations like extra time and text-to-speech. Discussion covers differences from ADHD, how evaluations clarify diagnoses, and real-world tools to help daily functioning.
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Processing Speed Is Efficiency Not Intelligence
- Processing speed is cognitive efficiency distinct from intelligence and working memory.
- Dr. Nigra describes a triad: input (visual/auditory), mental manipulation, and output (response) driven by white matter myelination.
White Matter Underlies Processing Speed
- Processing speed depends heavily on white matter and myelination which act like the brain's highway insulation.
- Slower white matter transmission delays information flow but doesn't mean the brain is broken.
How Tests Reveal Processing Speed
- Standard IQ tests measure processing speed via symbol search and coding that require rapid visual discrimination and motor output.
- These tasks are efficiency-under-time measures involving sustained attention and handwriting speed.