Echoic memories dissipate after approximately ________________?
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Answer: D. 1 second
Explanation
Echoic memory traces decay extremely rapidly, typically fading away within approximately three to four seconds. The initial neural representation of sound loses clarity sharply within the first single second. This brief duration prevents sensory overload while allowing enough time for conscious speech comprehension. Sensory memory systems have high capacity but extremely short durations compared to working memory. Auditory echoes last slightly longer than visual iconic memories, giving speech perception a temporal advantage. Neural decay in the auditory cortex accounts for the rapid fading of these unprocessed sound traces.
This rapid dissipation explains why people ask what was said right after missing the beginning of a sentence. Educational psychologists consider memory decay rates when designing effective auditory instructional lectures. Experimental memory research uses rapid serial presentation to measure the exact decay curves of sensory memory. One hour far exceeds the capacity of sensory memory, lasting well into long-term storage domains. One minute belongs to the timeframe of short-term or working memory rather than brief sensory echoes. Thirty seconds describes the duration of working memory rather than the rapid decay of echoic memory.
- Subject
- Psychology
- Category
- Psychology
- Topic
- —
- Difficulty
- medium
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