These fell into three broad categories: difficulties faced by the suicidal person in effectively communicating distress, difficulties experienced by significant others in interpreting and heeding distress signals, and difficulties experienced by significant others in taking action.
Patio seems to have run into a category difficulty: when, for example, is a patio a terrace?
Category difficulty parameters were fixed to estimated standard normal-distribution quantiles and were similar for all items.
The Rater Team could not agree on the rating for this question, because they disagreed about its level of difficulty (category: Difficulty).
For example, excerpts in the category Difficulty 1) include the words difficult, challenging, easy, etc., and 2) are clearly focused on the idea of determining how challenging a question is for students.
The item stem posed the question in terms of ability, in the present tense and made no reference to health, with a rating scale of four response categories: no difficulty, some difficulty, much difficulty and unable to do.
Consequently, we eliminated the three items which were flagged and recoded the rating scale for the successive analyses into three categories: no difficulty, some/much difficulty and unable to do.
Around one in every six admissions (n = 4,030, 17.1%) included diagnoses which were classified into two condition categories (breathing difficulty and feverish illness: n = 3,361, 14.3%; breathing difficulty and diarrhoea: n = 341, 1.5%; feverish illness and diarrhoea: n = 328, 1.4%).
To understand to what extent published assessments reveal evidence of first-year undergraduate biology students' knowledge and difficulties with experimental design, we used responses to the shrimp, drug, and bird assessments to identify students' correct ideas and difficulties, which, as shown in Table 3, were then classified within all five categories of difficulty.
In addressing RQ1, the literature review (Table 1) revealed that most authors had identified several major categories of difficulty, all of which were classified by us as established, except for two difficulties, which had limited available evidence and were classified as partially established.
