Expression Intensity Probes.DetectionSummary
From Array Suite Wiki
Expression Intensity Probes - Detection Summary
This plot displays the fraction of samples where the specified gene was called as "detected" by the MAS5 detection p-value cutoff of .05.
In certain Affymetrix microarrays, a MAS5 detection P-value is reported, which can be used to determine how real a signal is. Not all microarrays include this information, and many submitted datasets do not include a MAS5 p-value, so this View's representation of the data under-represents the validity of the underlying data.