Teller acuity is an example of which acuity category?

• A. Resolution acuity
• B. Recognition acuity
• C. Hyperacuity
• D. Color acuity

Answer: (A)

Teller acuity tests the ability to resolve fine spatial detail. It uses high-contrast stripe patterns and relies on the infant’s preference to look at the patterned side, so you’re measuring whether the visual system can distinguish two separate elements. That’s resolution acuity—the capacity to separate details in a scene. It’s not about recognizing a known symbol or letter (that would be recognition acuity), nor about judging tiny misalignments (hyperacuity), nor about color discrimination (color acuity). Teller tests are especially useful for preverbal children because they don’t require naming or pointing, only the ability to resolve patterns.