A research on a sample of 105 participants of the first and second part of the specialised training for ski instructors of the Croatian Snow Sport Instructors and Trainers Association (HZUTS) was conducted with the purpose of constructing and validating a measuring instrument for the evaluation of extrinsic feedback and determining relations of anthropological characteristics with discrete and serial motor skills in alpine skiing. The total sample of subjects according to the criteria of sex and ranking was divided into four subsamples: 16 female participants and 51 male participants in ski instructor training, 10 female and 28 male candidates for trainee ski instructors. The subjects were tested with 9 standard morphological measures (for the assessment of longitudinal and transversal skeleton dimensionality, body and subcutaneous fat tissue volume and mass); 8 tests for the assessment of motor skills (2 tests for the assessment of agility, test for the assessment of movement frequency, test for the assessment of explosive power, 2 tests for the assessment of repetitive and static power and 2 tests for the balance assessment); 5 variables for the assessment of discrete motor skills in alpine skiing; 2 variables for the assessment of competition performance and 2 variables for the assessment of serial skills in alpine skiing (a newly constructed training ground). Descriptive statistical parameters were calculated in order to analyze sensitivity, while the normality of distributions was verified with the Kolmogorov– Smirnov test (KS). The objectivity of the judges was determined with the help of the Cronbach’s alpha coefficient, inter-item correlation and intercorrelations among the judges (items). The differences between the subsamples in the applied variables were calculated with the analysis of variance. In accordance with the set targets of the relation between predictor variable clusters and criteria were determined in a series of regression analyses. The obtained results point to good metrical characteristics of the newly constructed training ground for the assessment of skiing skills, and this finding opens up new perspectives for the upgrade of docimological practices in the process of ski instructors training. The differences in morphological characteristics of subsamples given the skiing ranking were not found, which means that male and female populations of candidates for instructors and trainee ski instructors have a similar morphological frame. However, it was found that male and female trainee ski instructors have a higher level of motor skills than male and female candidates for instructors, especially in measurements based on which it is possible to assess physical fitness. This points to a more pronounced kinesiological engagement of trainee candidates which may be related to the subjects’ age as well. Contrary information of great significance was obtained with regard to skiing skills, i.e. skiing quality. Namely, in male population, expected superiority of ski instructor candidates as opposed to participants in the trainee training was discovered in the performance of skiing elements, but that was not the case in the female population. Female trainee ski instructors achieved better results in all tests, and statistically significant differences were found in the performance of distinctively dynamic skiing techniques which are characterised by a fast change in movement direction. The cause of this unusual occurrence, which may (and should) have repercussions on the process of ski instructors selection, is the fact that half of the female trainee ski instructors are alpine skiing competitors. Therefore, former skiing competition experience is more than a good predictor for the selection of high-quality ski instructors. By analysing the effect of individual dimensions of anthropological status on performance quality and result efficiency interesting information were obtained and they mostly confirmed previous findings (along with a significant contribution to their expansion), but some new information was also found. Namely, former findings showing that morphological build does not have a crucial influence on the skiing knowledge level of ski instructors were confirmed again. However, as opposed to previous research, in the area of motor skills in male population it was found that a higher level of motor skills, and especially physical fitness, has a statistically significant influence on the quality of performance in the complex ski training ground. Analysing the effect of discrete and serial motor skills on performance in the training ground showed that based on the motor skills level a completely logical prediction of performance quality and result efficiency in mastering the skiing training ground for instructor candidates and trainee ski instructors can be made. Although in the end it does not have a special significance for the overall findings, it must be emphasized that in this case, based on a higher level of discrete and serial motor skills in female population, a more precise prediction of performance speed and in male population of the training ground performance quality can be carried out. The reasons can probably be found in the already mentioned fact of skiing competition experience, especially of the female candidates for trainee ski instructors. High correlations between the performance quality and result efficiency in mastering the skiing training ground point to a justified application of both systems for assessing skiing skills in ski instructors. Even though the expert assessment of motor skills is in general irreplaceable, obtained results also enable a different approach to assessment of ski instructors’ quality, which in the end exists in the competitive alpine skiing. Therefore, the cost-effectiveness and precision of testing the training ground performance with a temporal measure instead of judge assessment is reality and probably a promising future. However, it is recommended to select the “parallel” evaluation, which may in the end lead to creating high-quality time standards that can significantly improve the selection process in the education of ski instructors, but also in other populations belonging to the family of advanced alpine skiers.