Turkish Validation of the Core Life Activities Scale

his observational methodological study will evaluate the validity and reliability of the Turkish version of the Core Life Activities Scale (CORE). The study will include approximately 300 Turkish-speaking adults aged 18 years and older from different age groups and socioeconomic backgrounds.

The CORE is a five-item self-report measure designed to assess five core areas of daily life: eating habits, sleep, physical activity, learning new things, and social relationships. Each item is rated on a five-point Likert scale ranging from 1 (never) to 5 (always).

After providing informed consent, participants will complete a demographic information form, the Turkish version of the CORE, the 12-Item Short Form Health Survey (SF-12), and the World Health Organization Quality of Life-BREF (WHOQOL-BREF). The SF-12 and WHOQOL-BREF will be used to examine the validity of the Turkish CORE. The CORE will be administered again one week later to assess test-retest reliability.

Psychometric analyses will be performed to evaluate the reliability and validity of the Turkish version of the CORE. Internal consistency, test-retest reliability, and construct-related validity will be examined. Data collection is planned between August 20, 2026 and September 30, 2026.

Inclusion criteria

Adults aged 18 years or older. Ability to read and understand Turkish fluently. No cognitive or physical impairment that would prevent completion of the questionnaires.

Willingness to participate voluntarily and provide informed consent.

Exclusion criteria

Diagnosis of a severe psychiatric or neurological disorder such as schizophrenia, bipolar disorder, or dementia.

Presence of a terminal or severe medical condition that substantially affects activities of daily living, such as advanced-stage cancer or severe cardiovascular disease.

Language barriers that prevent adequate understanding of the questionnaires. Providing inconsistent, intentionally inaccurate, or implausibly rapid questionnaire responses.