When there are missing data, subsets of the observations may not be measurable with other subsets. For instance, Person sample A responds to Test Form A, and Person sample B responds to Test Form B. If there are no common items nor common persons, combining these two datasets into one analysis will produce two disconnected subsets of responses.

 

SUBSETS= Yes performs subset and connectivity detection.

 

SUBSETS = No bypasses subset detection.

 

When subset detection is activated, "Probing Data Connection" displays in the Winsteps analysis window.

 

Subsets are reported if any are discovered.

 

 

Subsets are also shown to the right of the measure tables.