Introduction This study aims to adapt the Seizure Self-Efficacy Scale for Children (SSES-C) into Turkish and then assess its validity and reliability in children with epilepsy. validation of the scale was conducted by seven experts. To evaluate the content validity of the scale, we elicited judgments from a panel of 10 content experts. The expert judgments showed that the correlation between the items on the scale was fairly good (Kendalls W=0.411, p<0.001, ki-kare: 57.495). Load factor of 40% and a large factor analysis included analysis of substances and two factors accounting for 49.67% of the total variance explained. We calculated Cronbachs alpha coefficient for the internal consistency and the full-scale score showed good internal consistency (alpha 0.89). Within the context of reliability studies, it was found correlations varying between 0,98C0,74 for the two sub-factors of the scale. Test/retest correlation coefficients were significant (p<0,01) and high (r=0.99). In parallel forms reliability, the correlations between the Seizure Self-Efficacy Scale for Children and Childrens Depression Rating Scale were found to be negative, moderate and statistically significant (r=?0.58, p<0.001). Conclusion The measurements conducted on the Turkish version of the Seizure Self-Efficacy Scale for Children showed that it is consistent with the original scale, valid and reliable for Turkish society. refers to the extent to which any measurement tool measures the concept it is intended to measure, without contamination from other characteristics. In other words, validity is related to whether a measurement instrument serves its intended purpose in the intended domain effectively (25). The most preferred methods for assessing the validity of a scale are content validity and construct validity (26). The agreement among raters or judges on the relevance and clarity of the scale items is considered as an indicator for the content validity of the scale (27). In our study, after the content SKI-606 validity of the scale was evaluated by subject matter experts, the Kendalls W correlation test was performed to confirm the content validity. The test results confirmed that there was an agreement among the raters. In addition, it was determined that the statements contained in the scale were concordant with the Turkish culture and they represented the domain they intended to measure. Under the construct validity assessment of the scale, we conducted a factor analysis. The analysis results showed certain structural differences between the original scale and the adapted version. Although the original scale was one-dimensional, the adapted Turkish version generated two sub-dimensions. The subscale entitled self-management of seizures contained items (statements such as is commonly used by researchers as an estimate of the reliability of a specific measurement tool (29). Proper reliability assessment of a measurement instrument containing similar items and presumed to quantify SKI-606 the degree of homogeneity of items provides information about the internal consistency of that measurement device (30). Cronbachs alpha coefficient is widely used to assess the internal consistency of Likert-type scales (31). It is considered that the higher the Cronbachs alpha coefficient, the greater the internal consistency of the items in the scale, and the more it consists of items questioning the elements of the same feature (32). If the calculated Cronbachs alpha coefficient is 0.000.40, the scale is considered unreliable; if 0.400.60, the scale has low reliability; if 0.600.80, the SKI-606 scale is fairly reliable; and if 0.801.00, the scale is highly reliable (33). The Cronbachs alpha reliability coefficient of the SSES-C was 0.89 in our study, which showed a high degree of reliability. The reliability coefficient for the sub-dimension self-management of seizures was 0.89 and for the sub-dimension the influence of the environment in the management of seizures was 0.63. The Cronbachs alpha coefficient for the one-dimensional original scale was 0.93. In their study, Wagner et al. (34) calculated the Cronbachs alpha value of the scale as 0.85. refers to a process that examines the relationship between the scores of individual scale items to the overall scale score. It is used for discriminating the item that determines the extent to SKI-606 which success on an item corresponds to success on the whole test. To do this, the correlation coefficient is calculated (31,35). A test item with low correlation coefficients may be considered DPP4 unreliable and omitted from the scale (26). In our study, we examined inter-correlation results between the sub-dimensions and their correlation with the overall scale score. The correlations between the whole scale and its two sub-dimensions were 0.98 and 0.74, respectively, whereas the inter-correlation between the first and second sub-dimension was 0.59. A higher correlation coefficient for an item suggests a stronger correspondence with the theoretical structure that is intended to be measured, which confirms that such item provides an effective and adequate measure for the behavior.