The Historical Context of ADHD Diagnosis
Research shows that ADHD was initially recognized primarily in young, hyperactive males, which led to a significant underdiagnosis in other demographics, particularly adults, girls, and women. This narrow focus stemmed from early research and clinical observations that did not account for the diverse ways ADHD can manifest across different ages and genders. As a result, many individuals who did not fit the stereotypical profile of ADHD were left without the necessary diagnosis and support.

Dr. Kathleen Nadeau, a clinical psychologist, was among the first to challenge this limited understanding of ADHD. Early in her career, she noticed a pattern: the patients seeking treatment were predominantly young males exhibiting hyperactive behavior. Dr. Nadeau and her colleagues, including Dr. Patricia Quinn, began advocating for a broader recognition of ADHD, particularly in women and girls, who often present with inattentive symptoms rather than hyperactivity. Their efforts were met with resistance and skepticism from a field dominated by white male researchers, who dismissed their concerns as unfounded.