A Pilot Rasch Analysis of the Forms of Self-Criticis mand Self-Reassurance Scale in Acquired Brain Injury

Ashworth F, Bauch E, Bateman, A

METHODS

INTRODUCTION

RESULTS

What is Rasch Analysis?In the Rasch model, the probability of a specified response is modeled as a function of person and item parameters. It can also provide information about how well items or questions on assessments work to measure the ability or trait. Item locations (in logits) provide an interval level measure for statistical analyses.

Why use Rasch Analysis on the Formsof Self Criticism & Self Reassurance?Anxiety and depression are common after ABI.

Transdiagnostic processes such as self-criticism are linked to depression but are less understood after

ABI. Measures of self-criticism are not well validated in this population. The Forms of Self-Criticism and Self-Reassurance Scale (FSCSR) may be a useful tool for understanding self-criticism after brain injury therefore there is a good rationale for assessing its

construct validity.

CONCLUSIONS

RESULTS

Good targeting of the “Inadequate-self” subscale.

One limitation of the study is the

Preliminary AnalysisFSCSR has good fit to the model:• Item trait interaction analysis non-significant chi square

(0.161, p>0.05)• Reliability index (person separation index 0.91)• Power of test of fit – excellent

The category probability curve for item 16, an example of disordered thresholds in the original format of the questionnaire.

The item difficulties and participant ability are plotted on the same

“Rasch ruler” or item mapTherefore the data were rescored to 3 levels per qu estion and the threshold map for the rescored questionnaire was pl otted showing the items sorted by item difficulty:

itemspeople

Easily disappointed with self

47 patients data(assessment at OZC)

Analysis of responses to FSCSR in RUMM2020

72% of sample was male

Median age 34

ABI of 1-10 years prior to assessment at OZC

FSCSR (22-items)

reassure self

3 subtypes ofself-to-self relating

inadequate self

hated self

••

•

There is a part of me that puts me downAble to remind myself about positive things about myselfDifficult to manage my anger & frustration at myself

I find it easy to forgive myselfThere is a part of me that feels I am not good enough

I still like being meI feel beaten down by my own self critical thoughts

I have a sense of disgust with myself

I find it easy to like myself

I can feel lovable and acceptableI stop caring about myself

I have become so angry with myself that I want to hurt myself

I remember & dwell on my failingsI call myself names

I am gentle and supportive with myself

I think I deserve my self criticismI cant accept failures & setbacks without feeling adequate

I able to care and look after myselfThere is a part of me that wants to get rid of parts of myself

Thresholds were disordered and highlighted little e vidence that all categories of responding are needed.

sample size which is considered small for Rasch Anal ysis. However, this preliminary analysis indicates that t he FSCSR appears to work, demonstrating logical item ordering, satisfactory reliability and potential fo r interval level scaling of this trait.

www.ozc.nhs.uk fiona.ashworth@ozc.nhs.ukOliver Zangwill Centre for Neuropsychological Rehab ilitation, Ely, Cambridgeshire, UK