Our results are consistent with the reliability of the interobserver for the conventional semi-quantitative radiography method (Kappa interobserver values of 0.60 to 0.80 , ) and show that the semi-quantitative method of fracture of the vertebra can be reliably applied to the sagittal reconstructions of KVen thoracic. Participating observers represent a series of different levels of experience, including a relative novice with less than one year of experience, two intermediate observers each with several years of experience and a highly experienced and certified board radiologist. This range is representative of clinical practice. Four observers performed twice VFA in sagital reconstructions of 50 TCs of routine clinical. Intra- and interobserver tuning (absolute compliance or 95% compliance limits) and reliability (Kappa Cohens or intraclass correlation coefficient (ICC) were calculated for VFA visual measurements (lowest fractures, weakest fractures, cumulative fractures at the patient level) and for the loss of altitude of each broken vertebra relative to the adjacent vertebra. This report has two main objectives. First, we combine known analytical approaches to perform a comprehensive assessment of the match and correlation of scoring pairs and unravel these often confusing concepts by providing an example of good practice for concrete data and a tutorial for future references. Second, we examine whether a screening questionnaire designed to be used with parents can be reliably used with maternal assistants in the evaluation of early expression vocabulary. The evaluation covers a total of 53 vocabularies (34 parent-teachers and 19 parent-parents-couples) collected for two-year-olds (12 bilingual). First, the reliability of intergroups is assessed using the intraclass correlation coefficient (CCI) both within and within subgroups. Then, based on this analysis of the reliability and test reliability of the tool used, the Inter-Rater agreement, the size and direction of the evaluation differences are analyzed.