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Major differences across countries were observed for this item.
A floor effect was observed for this item, indicating low variability.
One possible explanation for this is that we did not include masks to eliminate lingering sensory memories; Saults and Cowan (2007) showed in a similar procedure that this was necessary to observe item-to-item trade-offs.
28 The items were chosen based on ease of observing item success, how well the item could differentiate within the population of interest and if the item could be readily described in the local languages.
The transformed score equaled 100× (observed item score – lowest possible item score)/(highest possible item score – lowest possible item score).
Also observe that items from different libraries may have different due dates.
The following effects were observed: Item 15: gender and age; item 16: educational level; item 23: gender and educational level.
We observed that item and order memory tasks were independently related to vocabulary development.
ANOVA revealed that a main effect of visual feedback delay was observed for item 2 (F(5, 85) = 7.81, P<0.01).
Uniform DIF for gender was observed for item 2 " Household work (cleaning, maintenance)".
(See Table 2) Uniform DIF for age group was observed for item 2, " Pain - At rest".
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com