Complex sentence: In practical test construction, item analysis is an iterative process, and it cannot be entirely automated; the psychometrician's judgement is required to determine whether the emerging set of items to be retained will constitute a satisfactory test of the target construct.
Split into simpler sentences: In practical test construction, item analysis is an iterative process, and cannot be entirely automated. The psychometrician's judgement is required to determine whether the emerging set of items to be retained constitutes a satisfactory test of the target construct.