Which is the manual target acquisition capacity?

• A. 8
• B. 12
• C. 14
• D. 10

Answer: (D)

Manual target acquisition capacity is about how many distinct targets a single operator can reliably identify and confirm on a display in a single pass. It reflects the limits of attention, working memory, and fast eye-hand coordination needed to scan, select, and verify targets under typical task demands. In standard conditions used for this material, about ten targets provide the best balance between speed and accuracy: enough throughput to be efficient, but not so many that misses or slow responses become likely. Fewer targets would underutilize what a trained operator can handle, while more targets would push cognitive and motor load beyond comfortable limits, reducing precision and speed. The number can shift if the display design or training changes, but ten is the conventional capacity in this context.