Simple Psychology — questionnaire and asset notices

IPIP items and scales: Lewis R. Goldberg and the International Personality Item Pool. Public domain, including commercial use and translation. https://ipip.ori.org/newPermission.htm
IPIP-50 keys: https://ipip.ori.org/new_ipip-50-item-scale.htm
IPIP-IPC: Patrick M. Markey & Charlotte N. Markey (2009), Assessment 16, 352–361. Official public-domain key: https://ipip.ori.org/newIPIP-IPCScoringKey.htm

Rosenberg Self-Esteem Scale: Morris Rosenberg (1965). Public domain; translations and adaptations permitted by the University of Maryland. https://socy.umd.edu/about-us/rosenberg-self-esteem-scale
The University of Maryland notes that the scale has no universal high/low cutoff.

Copenhagen Burnout Inventory: Kristensen, Borritz, Villadsen & Christensen (2005). Danish National Research Centre for the Working Environment. Original items/scoring: https://nfa.dk/media/a4wheblj/cbi-scales.pdf

EDE-QS: © 2016 Nicole Gideon, Nick Hawkes, Jonathan Mond, Rob Saunders, Kate Tchanturia & Lucy Serpell. Development and Psychometric Validation of the EDE-QS, a 12 Item Short Form of the Eating Disorder Examination Questionnaire (EDE-Q). PLOS ONE 11(5): e0152744. https://doi.org/10.1371/journal.pone.0152744
Supporting Information S2: https://doi.org/10.1371/journal.pone.0152744.s002
Used under Creative Commons Attribution 4.0: https://creativecommons.org/licenses/by/4.0/
Derived from the EDE-Q, © Fairburn and Beglin, 2008. The site supplies a Russian translation, a new presentation and result explanations. These changes are not endorsed by the authors. The local Russian wording has not undergone separate population validation. No measurements of weight or height are collected.

PHQ-4, PHQ-9 and GAD-7: Robert L. Spitzer, Janet B. W. Williams, Kurt Kroenke and colleagues; supported by Pfizer. No permission is required to reproduce, translate, display or distribute. https://www.pfizer.com/news/press-release/press-release-detail/pfizer_to_offer_free_public_access_to_mental_health_assessment_tools_to_improve_diagnosis_and_patient_care

The career reflection questionnaire uses original wording inspired by the six broad interest areas in John Holland's conceptual framework. It is not O*NET, IIP RIASEC, the Self-Directed Search or DDO. It does not claim psychometric validation or assess eligibility for employment.

Russian translations and editorial explanations are provided by this site, except where separately credited. Published evidence about an original instrument does not automatically validate a translation or establish a diagnosis for a visitor.

Interior photograph: Alexander Fife, Unsplash, photo YUgbVPf6bJs. https://unsplash.com/photos/YUgbVPf6bJs — https://unsplash.com/license
Owner portrait: supplied by the owner via their saved Avito listing 4472311715; used as explicitly requested for their own site. Original saved resolution 360x480.
Onest and Manrope fonts: SIL Open Font License 1.1, locally bundled through Fontsource.
Konsta UI: MIT. Lucide icons: ISC. Simple Icons: CC0; brand marks remain subject to their owners' trademark rights.