underidentified

English

Etymology

under- +‎ identified

Adjective

underidentified (not comparable)

1. Insufficiently identified
   • 2015 November 7, “A New Extension of the Binomial Error Model for Responses to Items of Varying Difficulty in Educational Testing and Attitude Surveys”, in PLOS ONE‎^[1], →DOI:

     We also note that the special case in which the b parameter is set a priori to 1 is underidentified and requires an arbitrary constraint on one item parameter or, equivalently, on the a distribution parameter.