At least one thousand consecutive prescription items were sampled from each pharmacy (a total of 8005 items) as for most pharmacies this represents several days prescriptions and enables several pharmacies in different locations to be sampled to provide a broader picture.
Every student was equipped with a handheld prompting them every 7 min to complete a short questionnaire consisting of the experience sampling items to be answered on a scale from 0 to 100.
We consider a general design that allows information for different patterns, or sets, of data items to be collected from different sample units, which we call a Split Questionnaire Design (SQD).
For factor and internal consistency analysis by treatment modality, which required all items to be completed, the final sample size was 286, 286, 195, and 247, for the overall treatment experience (hereafter referred to as 'overall"), surgery, chemotherapy, and radiation scales respectively.
For factor and internal consistency analysis by physician specialty, which required all items to be completed, the final analytical sample size was 155, 157, 138, and 106, for the overall treatment experience (hereafter referred to as "overall"), surgeon, medical oncologist, and radiation oncologist scales, respectively.
These datasets are characterization items to be persistently linked to the analysed samples (represented by their metadataset) and via the derivative hierarchy also to the individual specimens documenting the individual organismic source of these data.
Content validity can be scrutinized by having experts judging the extent to which test items are sampled from a target domain.
In this sense, the nature and scope of item selection is unimportant provided that the item set is sampled to provide appropriate domain coverage.
A total of 185 items were sampled from the initial PROMIS pediatric item banks (n = 293 items) and underwent cognitive interviews.
It also shows that, when the items are sampled from a properly defined domain, sub-samples of items can equally be used as parallel test forms still representing the domain and still capable of mapping both item difficulty and person ability onto the latent construct.
Suspected food items were sampled, and any E. coli O103 strains were typed by MLVA.
