The phrase "ascertained whether the items" is correct and usable in written English.
It can be used when discussing the process of determining or finding out information regarding specific items.
Example: "The team ascertained whether the items were in compliance with the safety regulations before proceeding with the shipment."
Alternatives: "determined if the items" or "verified whether the items".
It is difficult to ascertain whether the items were truly too difficult or if there were motivational and/or test targeting issues at play, especially due to the low-stakes nature of the implementation.
Likewise, the topic familiarity test was presented to content validators prior to the testing date to ascertain whether the items were within the scope of the topic under study and whether or not the items were understandable and within the level of the students being tested.
Future analyses are planned to assess construct validity in order to ascertain whether the items of the PARK tool apply to youth physical activity.
The CFA was implemented specifically to ascertain whether the 22 items that emerged in Study 1 continued to represent a single strong factor from the original 50-item pool in Study 2. Furthermore, we repeated the reliability and validity procedures employed in the previous study and examined (preliminarily) potential ethnic group differences in OWSQLI scores.
"The geomechanical study ascertained whether the deformation was linked to the seismic event, as this was not immediately obvious.
In reality, it is difficult to ascertain whether these items were truly too difficult or if there were motivational issues at play, especially due to the low-stakes nature of the assessment implementation.
To further ascertain whether the model without the method effect due to the negatively corrected items was poorly specified, composite reliabilities with the correlated uniquenesses (see Additional file 4: Table S4) and without the correlated uniquenesses (not reported) were compared.
