Measures of the magnitude representation (ratio and distance effects) do not discriminate children with DD from matched controls¶

Claim · All claims
Evidence · 1 study · associational r2 · q3
Currency · newest study 2013 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2016: tool and model accuracy changes quickly

Subclaims¶

q3 i? DD and control groups were practically indistinguishable on symbolic and non-symbolic magnitude comparison slope measures despite high trial numbers. → Szucs Denes 2013

Evidence¶

Szucs Denes 2013¶

Szucs Denes, Devine Amy, Soltesz Fruzsina, Nobes Alison, Gabriel Florence. (2013). Developmental dyscalculia is related to visuo-spatial memory and inhibition impairment. Cortex, 49(10). https://doi.org/10.1016/j.cortex.2013.06.007

q3 · i? · associational · r2

In the same case-control study, the between-group difference in the non-symbolic mean ratio effect was .1% and in the symbolic distance effect 2%, with the DD group slightly more accurate than controls on symbolic comparison; bootstrap confidence intervals were centered on zero.

"Overall, we conclude that DD and control groups were practically indistinguishable on measures of the MR while other tasks strongly and clearly discriminated these groups."

Discussion¶

Related Claims¶

• At all ages, children with developmental dyscalculia perform significantly lower than controls in magnitude comparison tasks using symbolic numbers — reports the opposite
• DD children's deficit in non-symbolic number magnitude processing appears only in studies of older children (10 years and above), not younger ones — reports the opposite
• The authors hypothesize DD children's first deficit is dysfunction in building the exact representation of symbolic numbers, with reduced ANS acuity as a consequence rather than a cause — related
• No univariate activation-level differences between adults with dyscalculia and controls during symbolic or non-symbolic number processing — related