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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: J Exp Child Psychol. 2010 May 31;108(3):414–435. doi: 10.1016/j.jecp.2010.04.007

Table 3.

Item difficulty (b), discrimination (a), and the discrimination parameter’s standard errors (s.e.) for the Silly Sounds Stroop (Inhibitory Control) task.

Item a (s.e.) Cat Dog b

a (s.e.) a (s.e.)
3 1.40 (0.16) 0.38 (0.14) ---- ---- −0.96
5 1.38 (0.16) ---- ---- 0.65 (0.12) −0.99
7 1.86 (0.20) ---- ---- 0.72 (0.13) −0.78
9 1.69 (0.17) 0.69 (0.14) ---- ---- −0.20
11 4.42 (0.64) 1.58 (0.29) ---- ---- −0.38
13 5.10 (0.82) 2.20 (0.43) ---- ---- −0.31
17 0.92 (0.13) ---- ---- 1.16 (0.14) −0.43
19 0.54 (0.15) 1.79 (0.22) ---- ---- 0.04
21 0.96 (0.14) ---- ---- 1.44 (0.16) −0.22
23 1.20 (0.33) 3.86 (0.88) ---- ---- 0.18
25 1.46 (0.23) 2.49 (0.31) ---- ---- −0.09
29 1.31 (0.21) ---- ---- 2.98 (0.31) 0.00
31 1.77 (0.39) ---- ---- 5.33 (0.93) −0.13
33 1.45 (0.26) ---- ---- 3.69 (0.44) −0.04

Note: This model was originally parameterized using an intercept parameter instead of the traditional b-parameter. The b-parameter value was obtained from the intercept value post hoc. No standard error for the b-parameter is available for this model.

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