For example, the question statement of Item 2 an item measuring an ability to identify the accented syllable of a word was "Choose the word whose primary accent is placed the same as the word given below".
This discrepancy indicates that the control subjects interpret the statements of these particular items rather differently from the patients, which is understandable due to lack of psychotic experiences in this group.
Additional file 1 Strobe statement checklist of items that should be included in reports of case-control studies.
Sample statements of the item scale included: "My partner(s) prefer(s) that we use a male condom during sex", "My friends always use male condoms during sex", "Most of my friends think that female condoms are just too much of a hassle to use", "My friends believe that insisting on using male condoms means that you don't trust your partner".
Reviewers were also asked to choose one of the three statements regarding sufficiency of items for oral dysesthesia symptoms: 1.
The CONSORT statement's checklist of items comprehensively addresses the notion of internal validity (avoidance of bias in the form of systematic error).
The present study confirms to the STROBE Statement, a checklist of items that should be included in reports of observational studies has been provided as Additional file 1 [ 33].
Design issues considered in this phase included the number of points on the scale between anchor points for each statement, the number of items on each page, the number of pages, the use of colour, page layout, navigation, and the presentation of results once the toolkit had been completed.
During the lengthy police investigation, more than 6,000 people were contacted, 2,500 statements taken and hundreds of items of evidence stored on a computer database.
Discrepancies between researcher and respondent perceptions of the meanings of items' statements can cause response bias for individual items across a sample (Lewise et al. 2005).
