In my mental model of ADHD, executive functioning is at the center of an hourglass-shaped graph. The bottom half consists of multiple "internal" layers/systems

In my mental model of ADHD, executive functioning is at the center of an hourglass-shaped graph. The bottom half consists of multiple "internal" layers/systems (neurological, psychological), in which some deficiency or deficiencies cause a lack of executive functioning (arrows point up from layers down below upwards to the central element of "executive functioning" to visualize the direction of causation). The upper half shows the outward facing layers/system behavior, social relationships, skills; the arrows point only upwards. I don't have any scientific source for this graph, but I never experienced any "ADHD"-related problem that I couldn't understand through this lens. Happy to share my sketch if anyone is interested.