The span of immediate memory was identified in 1956 to be 7 (plus or minus 2) by:

Name: The span of immediate memory was identified in 1956 to be 7 (plus or minus 2) by:
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George A. Miller, in his influential paper "The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information" (1956), identified the span of immediate memory to be 7 ± 2 items. This concept has become a foundational understanding in cognitive psychology regarding the capacity of short-term memory.

The Span of Immediate Memory Was Identified in 1956 to Be