One profile, two diagnostic rules
Young’s screen classifies a person as dependent at five or more of eight items, so no single symptom is required. Tao’s refined scheme instead makes preoccupation and withdrawal necessary symptoms alongside the count. Toggle the items and watch the same set of endorsements fall on opposite sides of the two rules.
Young (five-of-eight): meets criteria. Tao (preoccupation + withdrawal required): does not meet. The two rules disagree on this profile: withdrawal is absent, so Tao's necessary-symptom requirement fails even though the count clears Young's cutoff.
Is the internet use the disorder, or the symptom?
Davis’s model places maladaptive cognition at the causal center of a primary, generalized pattern; compensatory-use accounts hold that much problematic use is secondary to underlying distress. Set each and read how the same amount of use is characterized when one dominates the other.
The same population, a different prevalence
The bars are a fixed population of 1,000 people, grouped by how many of the eight symptoms each endorses; nothing about them changes. Only the cutoff moves. Watch the share classified as addicted swing as the threshold slides, with no change in the people themselves.