Which phenomenon concerns the emotional response to robots that resemble humans but are not quite human?

• A. Arpanet
• B. Moore's Law
• C. Botnet
• D. Uncanny Valley

Answer: (D)

The phenomenon is the Uncanny Valley. It describes the eerie or unsettling feeling people often experience when a robot or avatar looks almost human but not quite, triggering a discomfort that tends to peak as the likeness becomes very close to human yet remains imperfect in subtle ways like facial expression, movement, or voice. This concept helps explain why near-human machines can be disturbing and why designers sometimes choose a clearly nonrealistic appearance or invest heavily to perfect realism to avoid triggering that uneasy response.

Other terms refer to unrelated tech ideas: Arpanet was an early network that evolved into the Internet; Moore's Law describes the doubling of computing power roughly every couple of years; a botnet is a network of compromised computers controlled by an attacker. None of these capture the specific emotional reaction to near-human machines.