Telephone numbers are exactly seven digits long,likely due to recognition of
A)the limited duration and span of sensory memory.
B)the capacity of both echoic and iconic memory being restricted to about seven digits.
C)our short-term memory capacity being restrained to the magic number.
D)serial transfer of information from short-term to long-term memory.

Question

Quizplus · Accepted Answer

Our short-term memory capacity is generally limited to about seven items, which is often referred to as the "magic number" or "Miller's Law." To make telephone numbers easier to remember, they were likely shortened to exactly seven digits.

Telephone Numbers Are Exactly Seven Digits Long,likely Due to Recognition