This OSF project has been set up to provide an open access point of reference for the Černis Felt Sense of Anomaly (ČEFSA) scale, which measures Felt Sense of Anomaly-type dissociative experiences (Černis et al., 2021). Both versions of the measure are open access and free to use for non-commercial research and clinical care purposes. Please cite the relevant paper when using the scale. ---------- **The ČEFSA** The original (35-item) measure is available from: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0247037 - the full measure is in the Supplementary Information (S1) file. This paper also defines FSA-dissociation and illustrates its potential overlap with other dissociation constructs, such as depersonalisation-derealisation. The original (35-item) ČEFSA may be the best option if: - You wish to open a conversation with the respondent about their dissociative experiences. With more items, this version may potentially facilitate greater depth of conversation than the short-form. - You want to explore the different factors of FSA-dissociation separately. - The respondent is aged 18 or over. - It is not important to interpret the sum score (i.e., give it a descriptive label). Note that there is a 25-item version of the ČEFSA, which omits the ten items that failed the measurement invariance testing when developing the ČEFSA-14 - meaning that it is more psychometrically robust than the original version. This will be available in the Supplementary Material of the published ČEFSA-14 paper. ---------- **ČEFSA-14** The updated, short-form (14-item) measure with interpretive scoring guidance is available from: https://doi.org/10.1017/S1352465823000498 - the full measure is at the end of the page, in the Supplementary Material. This paper also discusses the invariance of the measure across gender, clinical status, and age. Notably, younger respondents (approx. mid-teens to mid-twenties) typically score higher on this measure, with average scores declining as age increases. This is a pattern noted for many forms of dissociation, as discussed in the paper. The short-form (14-item) ČEFSA-14 may be the best option if: - You wish to open a conversation with the respondent about their dissociative experiences. - The respondent is aged 13 or over. - You are administering the scale to a group which spans the age of 18 years. - You wish to repeat the measure with respondent(s) currently aged under-18 years over a period of time where they will turn 18. - It is not important to explore the factors of FSA-dissociation independently. - It would be helpful to interpret the sum score (see below). ***Important notes on the useage of the ČEFSA-14:*** The scoring guide for ČEFSA-14 was developed with reference to the spread of expected test scores along the range of theta (see short-form paper for further explanation), and **not** with reference to clinically-validated dissociation (e.g., SCID-D). Therefore, this OSF project exists to easily provide updates about the ČEFSA-14, since the interpretive scoring guides may be updated following further clinical validation. In the meantime, we recommend: 1. That you check back to this project page for updates before using the ČEFSA-14 scoring guidance. 2. In clinical contexts: that the ČEFSA-14 scoring guide is used along with your clinical judgement. Ranges 'elevated', 'moderately severe', and 'severe' refer to the expected severity *according to the spread of scores above the average observed value in our data*. These have not been verified against diagnostic tools and therefore **cannot** indicate likelihood of meeting dissociative disorder diagnostic criteria, etc. The score ranges are illustrative and should only be interpreted as part of a holistic overview of the presenting problem. 3. That the boundary between scoring ranges is **not** referred to as a 'clinical cut-off' (for the above reasons) in any research report or clinical documentation. ---------- **Translations of the ČEFSA & ČEFSA-14** German - *in progress* - led by Dr Johannes Heekerens, Charité – Universitätsmedizin Berlin, Germany. Ukrainian - *in progress* - led by Dr Kateryna Myronchak, University of Birmingham, UK. ---------- *Thank you for your interest in the ČEFSA scale(s).* *For any further queries, please email: e.cernis@bham.ac.uk*