An observation made 160 years ago by Jacob Abbott (1803–1879), subsequently reinforced and publicized by Robert Southey (1774–1843), that half the duration of human life seems to be passed within its first 15 to 20 years, is shown to agree with Lemlich's quantitative hypothesis of subjective aging.
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References
1.
LemlichR.Subjective acceleration of time with aging. Perceptual and Motor Skills, 1975, 41, 235–238.
