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The correct answer represented in the dataStorage-tag consequently also is more complex, as the item solution comprises two parts.
For items with an RT threshold identified, a dichotomous index of item solution behavior (SB) was computed for each student-item pair (see, e.g., Wise and Kong [2005]) as follows: SB = 1 if the RT was greater than the threshold; SB = 0 otherwise.
The stepwise scale analysis revealed a 10 item solution.
As can be seen in both cases the person item mapping is slightly less good than the 54 item solution with the items being marginally harder relative to the population.
Similar(56)
Otherwise, it will be impossible to compare the results across studies using different item solutions in the different components.
The effect of adding the further items, producing the 56 and 59 item solutions, on the person item distributions can be seen in Fig. 2.
Table 5 Items included and excluded from the SCBE 15-item solution Included Excluded Anxiety-withdrawal 1. Tem uma expressão facial neutra (não ri nem sorri) 8. Tímido/a, receoso/a (por ex. evita situações novas) 10.
We then deleted three additional items in each factor, and tested the new 15-item solution that showed an acceptable fit (X 2/df = 2.08, NFI = .86, CFI = .92, RMSEA = 0.80).
In the 17-item solution, the reliabilities of the subscales were above the usual cutoff point (> .70) and similar to those found in many other validation studies (Fisher, 1999, 2013; Gomez & Fisher, 2003; Gouveia et al., 2008, Gouveia et al., 2009, Gouveia & Marques, 2012).
Individual person fit statistics showed that no respondents had residuals outside the acceptable range for the 9-item solution.
This resulted in a 10-item solution demonstrating a good Rasch model fit for individual items (see online supplementary material) and the 10 items in aggregate (Chi-squared 16.2, p=0.7).
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