Journal
CHILD DEVELOPMENT
Volume 83, Issue 1, Pages 367-381Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1467-8624.2011.01683.x
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Funding
- NATIONAL INSTITUTE OF MENTAL HEALTH [R37MH044640] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON AGING [R01AG017083] Funding Source: NIH RePORTER
- NIA NIH HHS [R01 AG017083-10, R01 AG017083, R01-AG17083] Funding Source: Medline
- NIMH NIH HHS [R37 MH044640, R37-MH44640, R37 MH044640-20] Funding Source: Medline
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Children (n = 130; Mage = 8.5115.68 years) and college-aged adults (n = 72; Mage = 20.50 years) completed numerosity discrimination and lexical decision tasks. Children produced longer response times (RTs) than adults. R. Ratcliffs (1978) diffusion model, which divides processing into components (e.g., quality of evidence, decision criteria settings, nondecision time), was fit to the accuracy and RT distribution data. Differences in all components were responsible for slowing in children in these tasks. Children extract lower quality evidence than college-aged adults, unlike older adults who extract a similar quality of evidence as college-aged adults. Thus, processing components responsible for changes in RTs at the beginning of the life span are somewhat different from those responsible for changes occurring with healthy aging.
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