The "Cognitive Functioning Self-Assessment Scale" developed by Annunziata et al. in 2016, consists of 18 questions aimed at assessing cognitive function areas such as attention, memory, problem-solving, temporal-spatial orientation, and dual-task performance. Scoring is done on a 5-point Likert scale, ranging from 1 to 5. Higher scores on the scale indicate an increase in subjective cognitive complaints.

The HADS was developed by Zigmond and Snaith in 1983. The HADS consists of a total of 14 items, including 7 items for anxiety and 7 items for depression. The items are scored between 0-3 points on a 4-point Likert-type scale according to how the individual felt in the previous week. The scores that can be obtained from anxiety and depression subscales vary between 0-21. The Turkish validity and reliability study of the scale was conducted by Aydemir et al. in 1997. High scores obtained from the scale indicate increased mood disorder.

The BDI is a self-report scale developed by Broadbent et al. in 1982 to assess cognitive failures that occur in daily life. Errors in perception, memory and motor functions are assessed with 25 questions. Each question is scored from 0 (never) to 4 (very often). The total score that can be obtained from the scale ranges from 0-100. Higher scores indicate an increased level of cognitive failure and worse cognitive status. The Turkish validity and reliability study of the scale was conducted by Ekici et al. in 2016.