Parts of what we now call sluggish cognitive tempo (SCT) has been around since the 1960s, but it was in the late 1980s — long before any attention deficit hyperactivity disorder (ADHD) medications existed — when researchers first demonstrated that SCT symptoms are probably a unique condition or sub-type of ADHD (Lahey et al., 1988; Neeper & Lahey, 1986).
In other words, the scientific foundation for sluggish cognitive tempo has been around for nearly 30 years. It’s not new. And it’s hardly news. Scientists regularly identify dozens of proposed syndromes or symptom constellations in their research. Only a tiny minority of them ever go on to become a recognized mental disorder or diagnosis.
But does SCT really exist? Is it its own condition or disorder?