Validation of child-adapted short scales for measuring gastrointestinal-specific avoidance and anxiety, 2022, Lalouni, Chalder et al

Abstract
Aim
To validate child-adapted shortened versions of the Irritable Bowel Syndrome-Behavioral Responses Questionnaire (IBS-BRQ; short scale denoted BRQ-C) and the Visceral Sensitivity Index (VSI; short scale denoted VSI-C) for children with functional abdominal pain disorders (FAPDs).

Methods
A child psychologist supervised by a child gastroenterologist was responsible for shortening the scales (BRQ-C, 11 items; and VSI-C, 7 items). Then, a sample of 89 children aged 8-12 years with FAPDs was used in the validation. Construct validity was assessed with correlations. Measures included gastrointestinal symptoms, quality of life, pain intensity, and anxiety. Also, internal consistency, test-retest reliability, administration time, and factor structure were assesssed.

Results
Internal consistency for the BRQ-C and the VSI-C was α=.84 and α=.80, respectively. Correlations with related scales were similar between child-adapted scales and original scales, indicating construct validity equivalence. Correlations between short scales and original scales were high. Mean administration time was reduced by 47% (BRQ-C) and 42 % (VSI-C), compared with original scales. Test-retest reliability was r=.72 for BRQ-C and r=.83 for VSI-C. BRQ-C had two factors (Avoidance and Bowel control). VSI-C had a unifactorial structure.

Conclusion
The BRQ-C and the VSI-C were found to be time-saving, reliable and valid for children with FAPDs.

https://onlinelibrary.wiley.com/doi/abs/10.1111/apa.16403

 

This dowsing rod was tested on that other dowsing rod and they both agree therefore dowsing rods work.

In rod we trust! Shmart.

Seriously, in what way is this different from saying that a short-form questionnaire matching your personality to a Lord of the Rings species yields the same answers as the long form, therefore that questionnaire is valid in matching people's personality to a Lord of the Rings species?

There is no validity to the long form, it asks questions about GI symptoms so obviously it correlates for people with GI symptoms. It's like nothing matters. Clinical psychology is almost 100% truthiness, it's what feels true that must be true.