I wish it were true: Confessions of a secret deductivist

The criticisms by S. V. Paunonen and D. N. Jackson (1985, Journal of Research in Personality, 19, 331–342) are examined in detail. Despite the best of intentions, the author remains unconvinced.     

Exploring the Relationship Between Self-Isolation and Distress Among People with Gastrointestinal Disorders During the COVID-19 Pandemic

Journal of Clinical Psychology in Medical Settings - This study aimed to explore the association between perceived isolation and symptoms of distress in people with GI disorders at the time of the...     

You don't always get what you pay for: Measuring depression with short and simple versus long and sophisticated scales

In three studies subjects' depressiveness was assessed by a variety of instruments. Questionnaire scales were either comparatively short or long and either fairly simple, content oriented, and undisguised or sophisticated in the sense of reflecting psychodynamic theorizing or elaborate multivariate approaches to scale construction. Simple self-ratings were also obtained. Results showed that (a) short scales were as valid on the average as long scales in all three studies, even though some of the short scales were merely subsets of the long scales; (b) simple scales were as valid as sophisticated scales in all three studies; and (c) self-rating scales were as valid as questionnaire scales in two studies, but not in the third. The discussion focuses on certain unrealistic assumptions of the Spearman-Brown formula and on the notion of personality assessment as a noise-afflicted communication process.     

Test length and validity revisited

Results from three different subject samples extend earlier findings that lengthening a scale beyond some point can actually weaken its validity. A near-optimal algorithm selected the most valid aggregate of items from a common pool. Findings were then cross validated in a second sample. From this procedure emerged fairly short scales with acceptable cross validities, but only if the item pool had been prescreened for content saturation. Under these circumstances, even extremely short scales of two to four items each, which had survived double cross validation, suffered hardly any loss of cross validity. In a third sample they outperformed standard scales eight times as long. © 1997 John Wiley & Sons, Ltd.     

Extending the Common Sense Model to Explore the Impact of the Fear of COVID-19 on Quality of Life in an International Inflammatory Bowel Disease Cohort

The aim of this cross-sectional study was to use an extended common sense model (CSM) to evaluate the impact of fear of COVID-19 on quality of life (QoL) in an international inflammatory bowel disease cohort. An online study involving 319 adults (75% female, mean (SD) 14.06 (15.57) years of symptoms) completed the Gastrointestinal Symptom Rating Scale, Brief Illness Perceptions Questionnaire, Fear of Contracting COVID-19 Scale, Brief-COPE, Depression, Anxiety and Stress Scale, and the EUROHIS-QOL. The extended CSM had an excellent fit (χ² (9)?=?17.06, p?=?.05, χ²/N?=?1.90, RMSEA?=?0.05, SRMR?=?0.04, CFI?=?.99, TLI?=?.97, GFI?=?0.99), indicating the influence of gastrointestinal symptoms on QoL was mediated by illness perceptions, fear of COVID-19, adaptive and maladaptive coping, and psychological distress. Interventions targeting the fear of COVID-19 in the context of an individual’s perceptions will likely enhance QoL during the pandemic.