CURVES= probability curves for Table 21

CURVES= specifies which curves in Table 21 are to display. "1" to display the curves. "0" to omit the curve. Formerly also controlled Table 2, now done with T2SELECT=.

CURVES=000 indicates no curves are to be drawn - Table 21 will be skipped, unless STEPT3=N, in which case only the structure summaries are output.

CURVES=101 displays subtables 21.1, 21.3 (and 21.4, 21.6, ...) when Table 21 is selected.

CURVES=	Table 21 displays
100	21.1, 21.4, ...	Category probability curves (modes, structure calibrations)
010	21.2, 21.5, ...	Expected score ogive (means. model Item Characteristic Curve).
001	21.3, 21.6, ...	Cumulative category probability curves (medians, shows 50% cumulative probabilities)