Respondents and assigned option
The position N=1…100 is fixed. Each cell shows the corrected score X(−i) and the respondent's performance level.
The sliders change where A, B and C end; D receives the remaining cases.
Option analysis by performance group
Each line shows the proportion selecting A, B, C or D in the Lower, Middle and Upper groups.
Item statistics
pi (key C)
—
D = pU,C − pL,C
—
rpbis,i (C)
—
Statistics by option
Selection proportion by performance level
| Group | A | B | C | D |
|---|
Calculation for option C
click a column in the table
\(r_{pbis,j}=\frac{M_{1j}-M_{0j}}{S_X}\sqrt{p_jq_j}\)
pj
—
qj
—
M1j
—
M0j
—
SX de X(−i) (fixed for these 100 respondents)
—
The 100 respondents and their X(−i) remain fixed. Only the assigned option changes according to the A → B → C → D boundaries.
This means the same selection proportion can be retained while rpbis,j changes depending on which respondents fall within each option.