The Leuven Perceptual Organization Screening Test (L-POST), an online test to assess mid-level visual perception

Neuropsychological diagnostic 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. The Leuven Perceptual Organization Screening Test (L-POST) fills a gap with respect to clinically oriented tests of mid-level visual function. In 15 online subtests, a range of mid-level processes are covered, such as figure–ground segmentation, local and global processing, and shape perception. We also test the sensitivity to a wide variety of perceptual grouping cues, like common fate, collinearity, proximity, and closure. To reduce cognitive load, a matching-to-sample task is used for all subtests. Our online test can be administered in 20–45 min and is freely available at www.gestaltrevision.be/tests. The online implementation enables us to offer a separate interface for researchers and clinicians to have immediate access to the raw and summary results for each patient and to keep a record of their patient’s entire data. Also, each patient’s results can be flexibly compared with a range of age-matched norm samples. In conclusion, the L-POST is a valuable screening test for perceptual organization. The test allows clinicians to screen for deficits in visual perception and enables researchers to get a broader overview of mid-level visual processes that are preserved or disrupted in a given patient.     

Emotional flexibility and recovery from pain

This study aimed to investigate the relationship between two aspects of emotional flexibility (EF, i.e. flexible emotional responsiveness and affective flexibility) and tolerance for, and recovery from, experimentally-induced pain. Fifty-two adults completed a flexible emotional responsiveness task in which emotional responses on multiple dimensions were registered while watching positive and negative pictures. Affective flexibility was measured using a switching task with positive and negative pictures. Pain tolerance was assessed as the time participants endured an ischemic pain task and total time until recovery in terms of pain intensity and pain unpleasantness was registered. Flexible emotional responsiveness—reflected in divergent corrugator responses to positive and negative stimuli—was associated with faster recovery from pain unpleasantness. Affective flexibility was associated with recovery in terms of pain intensity, with faster switches from neutral towards affective aspects of positive stimuli being predictive of faster recovery. Results did not provide evidence for an association between EF and pain tolerance. The findings suggest that EF may protect against pain persistence.

     

Reliability and validity of the Leuven Perceptual Organization Screening Test (L‐POST)

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 Leuven 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. Cronbach'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.     

Painfully bored: the role of negative urgency and history of Non-Suicidal Self-Injury in Self-Administering painful stimuli

Motivation and Emotion - The current study aims to examine the causal effect of boredom on non-suicidal self-injury (NSSI), expanding prior experimental research by including an anger induction to...