Joel Nigg

Director, Division of Psychology
Oregon Health and Science University

Dr. Nigg’s research focuses on the underlying mechanisms and causes in attention deficit hyperactivity disorder (ADHD) across the lifespan. The primary focus is on cognitive and neuropsychological mechanisms. However, studies of genetics, family dynamics, personality and temperament, environmental toxins, and neuroimaging of ADHD are also ongoing.

From this contributor

Explore more from The Transmitter

Adriano Aguzzi.

Neuropathologist not guilty of research misconduct, says university probe

The investigation determined that seven papers by corresponding author Adriano Aguzzi have “scientifically significant” errors, which Aguzzi attributes to his former students.

By Dalmeet Singh Chawla
8 July 2026 | 5 min read
Research image of proliferating neural cells.

Diverse autism genes derail common developmental pathways

Multiple genetic mouse models initially show delayed cortical development, but the animals’ molecular trajectories diverge within weeks after birth, a new study finds.

By Holly Barker
8 July 2026 | 5 min read
Brain scans showing sex-based activation differences.

Brain’s sex differences are subtle and contradictory, large MRI study finds

Sex-based behavioral differences do not match with variations in brain activation or structure in a study of almost 1,000 people.

By Lauren Schenkman
8 July 2026 | 5 min read