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Table 3 Group differences on measures of symbolic magnitude processing and working memory

From: Patterns of symbolic numerical magnitude processing and working memory as predictors of early mathematics performance

  Weak SNMP
(n = 86)
Strong SNMP
(n = 66)
Weak SNMP & WM
(n = 60)
Strong WM
(n = 44)
F p η2p
M (SD) M (SD) M (SD) M (SD)
SYMP 1-digit 15.27a (3.30) 20.73b (3.14) 14.90a (3.56) 19.48b (3.03) 52.33  < .001 .38
SYMP 2-digit 5.43a (2.11) 12.53 (3.14) 6.20a (2.47) 8.57 (2.98) 101.48  < .001 .55
Forwards digit span 7.78a (0.96) 6.91 (1.49) 5.45 (1.32) 7.84a (0.89) 53.33  < .001 .39
Backwards digit span 6.37ab (1.65) 6.41ac (1.66) 4.47 (1.63) 7.09bc (1.43) 27.65  < .001 .25
Picture Span 15.99ab (5.16) 16.18ac (4.50) 13.90bc (5.32) 27.98 (2.87) 88.65  < .001 .51
  1. Note. Means within a row sharing the same subscripts do not differ from each other at p < .05 (SYMP 1-digit and backwards digit span with Bonferroni adjustment, otherwise with Games-Howell adjustment)