In addition, more knowledge on the exact developmental trajectory in learning difficulties is needed, but the current consensus of data can serve as a starting point for TES study designs.
The mean of item measures was more than 1 standard deviation lower than the mean of person measures, which indicates that all items were easily endorsed by this sample, and additional items with greater difficulty are needed to complement the scale.
For the CAT algorithm to be able to select items tailored to test taker's ability, many items of various difficulty levels are needed.
If a test is well targeted, that is, person abilities have a range similar to the range of difficulty of items, fewer observations are needed (n = 64).
Simple interventions can help children with VP difficulties, so research is needed into practicable, cost-effective strategies for identification and assessment, so that support can be targeted appropriately.
In light of these difficulties, further investigation is needed to understand the migration of degradation products from PET and ensure that it is safe for use in food and drinks containers [ 70].
"We see too many credit users falling into financial difficulty and more is needed to ensure that what should be a short-term product does not push people into unaffordable long-term debt".
Because of this difficulty, a different approach is needed.
Chlorine bleach was among the most widely available disinfectants, although people had difficulty gauging how much was needed to treat a given amount of water without creating an unpleasant taste or harmful concentrations.
Leaving aside conceptual difficulties, enormous amounts of algebra were needed to organize the different pieces of this calculation, far more than could be reliably done by hand.
