Questionnaires to assess pain catastrophizing, kinesiophobia, neck awareness, and upper extremity functionality were administered to individuals with chronic neck pain.

The Pain Catastrophizing Scale (PCAT) will be used to assess pain catastrophizing. The PCAT, whose Turkish reliability and validity were established by Uğurlu et al., includes 13 situations describing different feelings and thoughts related to pain. Each situation is scored from 0 (never) to 4 (always). The total score ranges from 0 to 52 points. A higher total score indicates increased pain catastrophizing. According to the scale, individuals scoring 30 or higher are considered to have pain catastrophizing

The Tampa Kinesiophobia Scale was used to assess fear of movement. The questionnaire, which will be used to measure individuals' perspectives on movement and their fear aspects, consists of 17 questions with total scores ranging from 17 to 68. Tampa scores greater than 37 indicate significant kinesiophobia.

The Fremantle Neck Awareness Questionnaire was used to assess neck awareness. It is a simple Likert-type questionnaire (0 = I never feel like this, 1 = I rarely feel like this, 2 = I sometimes or some of the time feel like this, 3 = I often feel like this, 4 = I always or most of the time feel like this) that assesses individual perception. The questionnaire asks nine questions, including how individuals perceive their neck relative to their body and how they perceive their body position. A high score indicates poor awareness.

The Quick Questionnaire for Disabilities of the Arm, Shoulder, and Hand (Q-DASH) was used to assess individuals' upper extremity function. This 30-question questionnaire assesses an individual's ability to perform functional activities (21 items), pain (5 items), and psychosocial aspects of the disease (4 items). The total score ranges from 0 to 100, with higher scores indicating better outcomes.

The short form of the McGill Pain Questionnaire (SF-MPQ) was used to assess pain. The main component of the SF-MPQ consists of 15 descriptors (11 sensory; 4 emotional) rated on an intensity scale as 0 = none, 1 = mild, 2 = moderate, or 3 = severe. Three pain scores are derived from the sum of the intensity rank values of the words selected for the sensory, emotional, and total descriptors. A higher score indicates a higher level of pain.