The aim of this study is to examine the validity and reliability of the Turkish version of the Temperature Sensitivity Scale in individuals with Parkinson's disease. This cross-sectional methodological study will evaluate the psychometric properties of the scale, including internal consistency, test-retest reliability, and construct validity, in order to provide a valid and reliable tool for assessing temperature sensitivity in Turkish-speaking individuals with Parkinson's disease.

Inclusion Criteria:

• Clinical diagnosis of Parkinson's disease Hoehn and Yahr stage 1-3 Age between 40 and 85 years Mini-Mental State Examination (MMSE) score ≥ 24 Sufficient cognitive function to communicate and complete assessments Patients attending the Movement Disorders Outpatient Clinic of the Neurology Department Willingness to participate and provide written informed consent

Exclusion Criteria:

• Presence of psychiatric disorders (e.g., major depression or psychotic disorders) Diagnosis of advanced dementia Presence of uncontrolled systemic chronic diseases (e.g., diabetes mellitus or hypertension) Presence of severe cardiovascular or respiratory conditions Presence of additional orthopedic or neurological conditions that may affect test performance Severe visual or hearing impairments that could interfere with assessments Inability to cooperate adequately with the physiotherapist during assessments

The study population will consist of individuals with clinically diagnosed Parkinson's disease (Hoehn and Yahr stage 1-3), aged between 40 and 85 years, with adequate cognitive function (MMSE ≥ 24). Participants will be recruited from patients attending the Movement Disorders Outpatient Clinic of the Neurology Department. The study population represents ambulatory individuals with mild to moderate disease severity suitable for comprehensive biopsychosocial assessment.