The Anffimov's test is used to measure concentration of attention.

• A. It measures concentration of attention
• B. It measures resting heart rate
• C. It measures color perception
• D. It measures pain threshold

Answer: (A)

Concentration of attention means the ability to maintain focus on a task and respond consistently over time, despite distractions or fatigue. Anfimov's test is designed to probe exactly that by requiring continuous attention and rapid, accurate responses as tasks repeat. The results reflect how well someone can sustain attentional engagement and control their responses under ongoing demand, which is what this concept measures.

Resting heart rate gauges autonomic arousal, not sustained attention. Color perception tests sensory discrimination, not the ability to stay focused over time. Pain threshold assesses nociception and tolerance to painful stimuli, which is unrelated to attentional concentration.