Conceptualization and measurement of getting lost behavior in persons with early dementia.

Background: The primary purpose of this preliminary research was to describe the psychometric properties of a newly-developed Everyday Spatial Questionnaire for Dementia-patient version (ESQD-P) in a Chinese population. A secondary goal was to assess the relationship between executive functions and wayfinding strategy application. The ESQD-P is a measure for the phenomenon of 'getting lost behavior' (GLB) reported by early Alzheimer's disease sufferers, based on the concept of spatial problem-solving.