One or more reviewers assess the difficulty of each component of the item using this scale, and in the case of multiple reviewers, all ratings are averaged across reviewers to generate the difficulty rating.
First, in order to enhance understandability, the word 'best' was removed from the instruction component of the item.
We first explored the underlying component structure of the items by means of exploratory factor analysis (principal component analysis) using principal axis extraction and the varimax rotation method, which maximises the independence of the factors.
The generic measure was the 12-item Short Form Health Survey (SF-12v2), which is derived from its 'parent measure' the 36-item Short Form Health Survey (SF-36) [ 22, 23], with the 12 items reproducing 90% of the variance in the overall Physical and Mental Health components of the 36 item parent form [ 24].
The analysis of samples revealed several inaccuracies between the declared compositions for the fireworks and the obtained results, which could be attributed to cross-contamination during their manufacture or to a transfer between other components of the pyrotechnic item.
Construct validity was assessed with an exploratory factor analysis to determine the key components of the 47-item questionnaire.
While the target words of these two sets are the same, other components of the question item (reading passage, correct answer, and distractors) are different, as ones are created by machine while the others are by human.
For the components of the questionnaire, item, reliability and factor analyses will be performed.
Relationships between temporal orientation and short-term recall components of the six-item screener did not reveal any significant univariate or multivariable relationships with insolation, indicating that no single component was likely responsible for the relationship (data not shown).
