Known groups comparisons were made for the physician-rated clinical severity item (split into two groups at the median) and the CHRIs physical health and mental health items (collapsed to three levels).
To examine overall subsequent memory effects, unbiased with respect to associativity, a voxel-wise analyses of the fMRI data from the study phase was conducted which contrasted activity during encoding of subsequently remembered items (collapsed across II and IR conditions) with activity for subsequently forgotten items (Forgot condition).
And like those phantasmagoric stage sets in which nothing is quite what it seems, virtually every item collapses, converts to something other than what it appears to be, skates about on wheels, or opens to reveal an ingenious feat of design.
Congruent trials included displays in which a given participant's size and contrast anchor points occurred in the same item, collapsed across left and right positions (e.g., congruent trials for a participant with a bias toward tall-dark items included trials with [dark-tall light-short] and [light-short dark-tall] configurations).
In instances where there is too little discrimination between two response categories on an item, collapsing the categories into one response option can often improve scale fit to the Rasch model.
Responses to these three items were collapsed into a "qualitative" binary indicator of reported discrimination in the social environment (those who have already felt discriminated against by either a relative, a friend or a colleague versus those who never experienced such discrimination).
For data analysis, the food items were collapsed into sixteen food groups.
These items were collapsed and recoded as either disagree, neutral, or agree.
Attitudinal and knowledge items were collapsed into two categories: 1) strongly disagree and disagree; and 2) strongly agree and agree.
All items were collapsed into three categories, except Bladder Management and Stairs, which were dichotomised (see table I).
