Adults with DD show deficient time/duration processing but preserved length processing, with mixed findings across studies¶
Claim · All claims
Evidence · 1 study · reviewr2·q2
Currency · newest study 2020 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2025: baselines and conditions change
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? Adults with DD exposed difficulties with numerical and temporal processing while length processing was preserved in one study, but another study found preserved temporal discrimination when non-numerical stimuli were processed, and length findings are inconclusive across studies. → Liane Kaufmann 2020
Evidence¶
Liane Kaufmann 2020¶
Liane Kaufmann, Michael von Aster, Silke M. Göbel, Josef Marksteiner, and Elise Klein. (2020). Developmental Dyscalculia in Adults: Current Issues and Open Questions for Future Research. Lernen und Lernstörungen, 9(2), 126–137. https://doi.org/10.1024/2235-0977/a000294
q2 · i? · review · r2
Review reports De Visscher et al. (2018) finding DD deficits in numerosity and duration but preserved length and face categorization, interpreted as a non-symbolic magnitude deficit excluding length. Cappelletti et al. (2011) found preserved temporal discrimination with non-numerical stimuli, supporting a partially shared quantity system.
"adults with DD exposed difficulties with numerical and temporal processing, while length processing (and also face categorization) was preserved (De Visscher et al., 2018)."
Discussion¶
Related Claims¶
- Adults with DD show deficient alerting and executive attention with preserved orienting, indicating domain-general deficits beyond number processing — related
- Adults with DD show deficient conceptual size processing with preserved physical size processing, supporting shared magnitude substrates — related
- Adults with DD rely on time-consuming back-up strategies like finger usage for single-digit arithmetic, with prolonged response latencies that appear number-specific — related
- Non-symbolic magnitude processing shows mixed associations with inhibition measures — related
- Adults with dyslexia without dyscalculia show no deficit in nonsymbolic numerical magnitude processing — related
- Distance estimation is preserved in adults with developmental dyscalculia — related
- Adults with developmental dyscalculia are impaired in everyday numerical tasks, particularly time estimation, measure, and money usage — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
dd-adults-time-duration-deficit-length-mixed |
title |
Adults with DD show deficient time/duration processing but preserved length processing, with mixed findings across studies |
description |
Adults with DD show deficient time/duration processing but preserved length processing, with mixed findings across studies |
status |
review |
evidence_strength |
mixed |
newest_evidence |
2020 |
recheck_by |
2025 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — liane-kaufmann-2020 |
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