Dual-Task Input and Decision Training: Practice Thinking During Fast Input

Sun, 12 Jul 2026 00:00:00 +0000

Free installable web app (PWA)

Dual-Task Input and Decision Training

The app measures input speed and decision accuracy separately, then compares them with performance when both tasks are combined.

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When a user speeds up number-key and mouse input while judging a new visual situation, choosing the next action can become harder. Hand speed alone does not explain this problem. The user selects an input sequence while also judging the situation. When those choices overlap, selecting the next action can take longer. This app does not score input speed alone. It also measures the decision performance that remains during input.

Why Heavy AI Use Can Slow a Company Down: The Hidden Costs Beyond Tokens

Sun, 21 Jun 2026 17:56:30 +0900

The cost of AI includes not only usage fees, but also the time people spend reading and correcting its output.

When a company starts using AI heavily, everything seems faster at first. Reports appear sooner. Meeting notes are organized. Emails read better. Everyone says productivity has improved.

Then something strange happens. The company produces more, but decisions do not come any faster. Documents multiply, while fewer people take clear ownership. A summary arrives before the meeting, but the meeting lasts just as long. More AI has not made the company faster. It has made the work more complicated.

Decision Making on Seunghoon Choi

Dual-Task Input and Decision Training: Practice Thinking During Fast Input

Dual-Task Input and Decision Training

Why Heavy AI Use Can Slow a Company Down: The Hidden Costs Beyond Tokens