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Reliability and validity of the L euven Perceptual Organization Screening Test ( L ‐ POST )
Author(s) -
Vancleef Kathleen,
Acke Elia,
Torfs Katrien,
Demeyere Nele,
Lafosse Christophe,
Humphreys Glyn,
Wagemans Johan,
deWit Lee
Publication year - 2015
Publication title -
journal of neuropsychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 37
eISSN - 1748-6653
pISSN - 1748-6645
DOI - 10.1111/jnp.12050
Subject(s) - psychology , perception , cronbach's alpha , discriminant validity , convergent validity , test (biology) , reliability (semiconductor) , cognition , neuropsychology , cognitive psychology , psychometrics , clinical psychology , internal consistency , psychiatry , neuroscience , paleontology , power (physics) , physics , quantum mechanics , biology
Neuropsychological tests of visual perception mostly assess high‐level processes like object recognition. Object recognition, however, relies on distinct mid‐level processes of perceptual organization that are only implicitly tested in classical tests. Furthermore, the psychometric properties of the existing instruments are limited. To fill this gap, the L euven perceptual organization screening test ( L ‐ POST ) was developed, in which a wide range of mid‐level phenomena are measured in 15 subtests. In this study, we evaluated reliability and validity of the L ‐ POST . Performance on the test is evaluated relative to a norm sample of more than 1,500 healthy control participants. C ronbach's alpha of the norm sample and test–retest correlations for 20 patients provide evidence for adequate reliability of L ‐ POST performance. The convergent and discriminant validity of the test was assessed in 40 brain‐damaged patients, whose performance on the L ‐ POST was compared with standard clinical tests of visual perception and other measures of cognitive function. The L ‐ POST showed high sensitivity to visual dysfunction and decreased performance was specific to visual problems. In conclusion, the L ‐ POST is a reliable and valid screening test for perceptual organization. It offers a useful online tool for researchers and clinicians to get a broader overview of the mid‐level processes that are preserved or disrupted in a given patient.