The dimensions of the IPES are formulated as groups of observations in terms of several categories, as we can find in many studies in different contexts. This structure can remain hidden when a global analysis of the information is made. In this sense, Factorial Analysis can work with variables of different natures and allows the information to be treated in terms of multiple tables, not limiting itself to the search for relationships between variables or to the individuals, but extending its scope to a comparative analysis, which takes into consideration the relationships between variables within each table and the relationship between tables of different natures.
It is also important to be aware of the relationships between the different HEI and those which exist between the HEI and the groups of variables, and finally, determine on which variables should action be taken in order to improve the performance of the HEI. In order to do this, the behaviour of the HEI regards its performance in each one of the groups of selected variables, the relationships existing between groups (categories) of variables and the relationships between HEI will be analysed. In this study, in addition to the dimensions which make up the IPES, variables which make reference to the resources that the HEI can count on to carry out their mission functions will also be considered, given their great importance as regards the study of the current situation of an HEI.
The analysis of these relationships may have an impact on the establishment of action plans on the part of those administering the Colombian higher education sector in view of improving the quality in the training of future graduates and in the research processes of the teaching staff, which at the same time will lead to the improvement of performance at an institutional level, and by extension, to the Colombian State University System.
3.3. Multiple Factor Analysis (MFA)
On carrying out the general analysis (MFA) for the variables and groups considered, we found that with 3 factors (dimensions) explains 80.68 % of the variability contained in the 14 analysed variables is achieved.
Table 3 shows the intrinsic values and the variability explained by each one of the 3 principal components (factors).
In
Table 4, the correlations between the groups of variables and the factors (
F1, F2, F3) can be observed. The existence of common factors between the groups is justified by the correlation between the factor and the groups of variables. The high degree of correlation of factor 1 with the three groups of variables (Resources, Access, Quality and Achievement) is interpreted as a common axis to the four groups, that is to say, we can state that there exists a direction (factor 1) of dispersion which is almost analogue in the four groups of variables, whereas factor 2 reduces its correlation significantly for two of the groups, Access being the category with the greatest correlation with this second factor. Finally, factor 3 shows the greatest correlation with the Quality group.
When a common direction of dispersion exists to all or some of the groups, it is of interest to measure and compare their importance in the different groups. The importance of a factor in a group is measured by the accumulated inertia of the variables of the group over this factor, which is also referred to as the weight of the factor in the group [
19].
In
Table 5, the coordinates of the groups over the factor axes of the MFA are observed. These coordinates represent the decomposition of the accumulated inertia of the variables of the group over the corresponding axis of the MFA, that is to say, its importance. The high values for the four active groups in the first factor indicate that this principal component is closely related to each one of the groups, in the sense that it constitutes a significant direction of inertia for each group of variables. Specifically, this first factor is linked to a large number of variables of each one of the groups, and in particular to variables of the Achievement (0.924) and Resources (0.916) groups.
As for the variables of the Access (0.645) group, they are more important in the definition of the second factor, whereas the variables of the Quality (0.312) group are those which chiefly define the third factor.
In
Table 5, the coordinates which indicate the correlation which exists between each group of variables and the factors resulting from the MFA are presented. It may be observed that Institutional Accreditation (0.282) is more related to the first factor than with the remaining factors, (0.095 for F2 and 0.134 for F3), therefore, we can state that they also relate more to the Achievement and Resources groups.
The representation in graph form of the data from
Table 5 is presented in
Figure 1;
Figure 2, where the distribution of the groups of variables in the factor axes may be appreciated.
Table 6 shows the association of the variables with the factors. We can observe how factor 1 (F1) is more associated with the Achievement group of variables, followed by the Resources, Access and Quality group. That is to say, 29.732% of the inertia collected by the first factor is caused by the variables which make up the Achievement group, whereas 29.482%, 22.148% and 18.638% are generated by the variables of Resources, Access and Quality, respectively. Furthermore, this first factor explains 29.1% of the dispersion of the different HEI in accordance with its behaviour in the Quality group of variables, 82.10% of the existing dispersion in the Resources group, 75% of the variability in the Achievement group and 34.90% of the variance in the Access group.
The contribution of the Access group to the formation of the second factor amounts to 57.97%, whereas the contribution of the Quality group in the definition of the third factor amounts to 52.56%.
In MFA, it is possible to highlight the groups of quantitative variables using the cosine-squared values, those which indicate the quality of representation in the factor map, that is to say, it is a measure of how well the group of variables are reflected by the dimensions.
The cosines-squared shown in
Table 6 indicate that the first factor presents a good reflection of the variability present in the four groups of variables, this not being the case for the second factor, where only the Access group stands out. As for the third factor, it contains very little reflection of the groups of variables.
Table 7 shows the Lg coefficients, in which we may observe that the Access group contains the most heterogeneous variables (the most multidimensional group) followed by Quality and Achievement, whereas the most homogeneous is Accreditation followed by Resources.
Table 8 shows the RV coefficients. These are defined as a measurement of the association between the groups. From the table, it may be discerned that a strong similarity exists in structure between the Resources group and the Access and Achievement groups due to the high correlation between them, whereas the Accreditation group is associated more with Quality (0.462). Obviously, the relationship is greater between each one of the groups and the general table (MFA Row).
When the estimated factors are not correlated, that is to say, they are orthogonal, the factor loadings are also the correlations between the factors and the variables. Hence, in
Table 9, it may be observed that the variables most correlated with factor one (F1) are IL3—Weighted Number Research Groups (0.976), IL2—Weighted Number Researchers (0.966), IA2—Weighted Post-graduate Enrolment (0.953), IR1—Administration Personnel Costs (0.928) and those least related are IC3—Proportion of Teaching Staff with Master’s (0.084), IA3—Retention rate(0.138), IL1—Under-graduate Graduation rate (0.155), e IC5—Proportion of Accredited Programmes (0.359), in this way confirming the first factor’s association with variables of the Achievement group.
The most correlated variables with factor two (F2) are IA3—Retention rate (0.758), IA4—Weighted Undergraduate Enrolment (−0.733), IC5—Proportion of Accredited Programmes (0.586), IL1—Under-graduate Graduation rate (0.581), e IC3—Proportion of Teaching Staff with Master’s (0.454), and those least related are IL3—Weighted Number Research Groups (−0.017), IL2—Weighted Number Researchers (−0.018), IR1—Administration Personnel Costs (−0.031), and IR2—Investment (−0.083), in this way confirming the second factor’s association with variables of the Access group.
Finally, the most correlated variables with factor three (F3) are IC3—Proportion of Teaching Staff with Master’s (0.734), IA3—Retention (−0.510), IC5—Proportion of Accredited Programmes (0.455), IC2—Critical Reading (0.374), e IC1—Quantitative Reasoning (0.289), and those least related are IL4—Number of Articles Published /Full-Time Teaching Staff (DTC) (0.07), IR3—Number of Teaching Staff on Equivalent Full-Time (DTCE) (0.065), IC4—Proportion of Teaching staff with PhD (−0.021) and IA2—Weighted Postgraduate Enrolment (−0.016) in this way confirming the third factor’s association with variables of the Quality group.
Figure 3 shows a reflection of the variables as regards their correlation with the factor axes. The arrows indicate the directions of growth of said variables in the factor space, which allows us to identify, in graph form, which variables have the most weight in each component. The centre of the circle of correlations represents the mean of all variables.
The different variables correlate to a greater or lesser extent depending on how close their vectors are, that is to say, that the nearer the angle between these variables is to zero, the more correlated they are and vice-versa. As may be observed in
Figure 3, the IR2 variable—Investment, forms an angle of 90° with IA3—Retention, as does the IA4 variable—Weighted Undergraduate Enrolment, with the IC2—Critical Reading and IC1—Quantitative Reasoning variables, which indicates that the first variable is not associated with the second. In general, it may be observed that there is a high degree of correlation amongst the variables of the Achievement, Resources and Quality groups, which is not the case for the variables of the Access group. In particular, a high degree of correlation may be observed between IL2—Weighted Number of Researchers, IL3—Weighted Number of Research Groups, and IL4—Number of Articles Published by Full-time Teaching Staff.
The MFA allows for the projection of the 32 HEI in a factorial plane and describes their behaviour in relation to their coordinates (
Figure 4 and
Figure 5), that is to say, the individual (HEI) seen for all groups of variables, which allows us to visualise the structure and similarity of the HEI studied. As may be observed, the majority of HEI have a similar structure, with the exception of UNAL, UDEA, UNAD, Valle and UIS.
In
Figure 4, it may be observed that the HEI are more developed in Achievement indicators (and greater Resources) the more to the right of the plane they are, and the greater development in Access indicators, the more their position moves towards the top. Similar results may be discerned from
Figure 5, the HEI which have the best performance in Quality are found more towards the top.
In this way, two HEI may exhibit the same behaviour as regards to one axis, such as Pedagógica and Militar with respect to the first and third factor (Achievement and Quality, respectively) and, nevertheless, show distinct behaviour as regards the second factor (Access). In this case, the performance of Pedagógica is better than that of Militar with respect to this second factor (Access).
The results for the HEI obtained from the analysis carried out with a single group of variables are termed partial individuals, that is to say, an individual considered from the point of view of a single group of variables.
Figure 4 and
Figure 5, are shown for each HEI included in the study, the point corresponds to the individual (centre of gravity). That is to say, the individual seen by all the groups of variables. For a given individual, there are as many partial points as groups of variables.
Figure 6 and
Figure 7 show the partial individuals’ graphs for 1 and 2, and 1 and 3 dimensions, respectively. The partial individual’s graph reflects each HEI seen by way of each group of variables and its centre of gravity.
It may be observed that UNAL has the best performance in Achievement, it is in the mean value as regards performance in Access and is a low performer in Quality, whereas UDEA has the second-best performance rating in Achievement, a mean value performance as regards Access and performance somewhat above the average in Quality. UNAD has a mean value performance as regards Achievement, the lowest performance in Access and the best performance in Quality. The Universidad Pedagógica Nacional has the best performance in Access, a mean value performance as regards Achievement and the second-best performance in Quality (jointly with the Universidad Militar).
For their part, the Pacífico, Chocó, UPFS–Ocaña, Guajira, Cesar, Pamplona and Cundinamarca universities display the lowest performances in the first factor (Achievement), however, we should remember that this factor is also associated with Resources, that is to say, these are HEI which also show low levels of resources.
The universities of Guajira, Pamplona, Cesar, Pacífico and Chocó show the lowest performance in Access. The universities of Chocó, Guajira, Pacífico, Ocaña and Cesar show the lowest performances in Quality.
In general terms, we can interpret
Figure 4 and
Figure 5 as reflecting that the HEI which are similar are found close to each other on the plane. (See
Figure 6 and
Figure 7)
Figure 8 is an amplification of
Figure 7, showing the universities which exhibit the most weaknesses (third quadrant). As may be observed, the universities which show the greatest deficiencies are those of the Pacífico, Chocó, UFPS–Ocaña, Guajira, Cesar, Amazonía, Sucre, Llanos, Pamplona and Cundinamarca.
As can be seen in
Figure 8, generally speaking, the HEI in the study need to make great improvements to the variables in the Quality, Achievement and Access groups. In particular, the universities of Chocó and Pacífico should improve indicators for the Quality group, the universities of Pamplona and Cesar are shown to have the greatest problems in the variables of the Access group and the universities of Cesar and Cundinamarca are shown to have the greatest problems in the variables of the Achievement group.
In general terms, these HEI need to make a great effort to improve, especially in the indicators from the area of management.
Figure 9 is the graph of the partial axes. It shows the principal surveyed components over the plane of the first two principal components of the MFA and reflects the relationship between the MFA factors and the principal components obtained from the PCA of each group separately.
In this graph, it may be observed that the first factor of the MFA is closely correlated both with the first principal component of the Achievement group and with the first principal component of the Resources group. The second factor of the MFA is primarily related to the second principal component of the Achievement and Resources groups. From this, we can again corroborate the close relation which exists between the variables of the Achievement group and those of the Resources group.
3.4. Synthetic Index of Performance (IAFM) of the Colombian State HEI
Following this, the synthetic index of performance (IAFM) of the Colombian state HEI is calculated in accordance with the proposed procedure, which allows for the organisation of the universities into a ranking order and the subsequent allocation of funds to each of the HEI, as established in Article 87 of Law 30 from 1992. The calculation of the
IAFM is carried out using the factor scores of the first four dimensions of the MFA, given that with 4 dimensions, 85.76% of the variance contained in the original data can be explained. The percentage of variance explained by the first three factors is shown in
Table 3, the fourth factor explains 5.082% of the variability present in the original data.
The exponential transformation applied to the factor scores from
Table 10 is carried out by way of the algebraic expression (1) where
and which produces the values of
which are shown in columns 2–5, of
Table 11.
The results of the last column of
Table 11 were obtained by way of the weighted sum of the transformed scores
. Weighting is applied using the proportion of variance explained for each dimension of the MFA by way of the expression (2), in such a way that the transformed score of the first factor has been weighted by 0.52087, the transformed score of the second factor has been weighted by 0.1863, the transformed score of the third factor has been weighted by 0.09956 and finally, the transformed score of the fourth factor has been weighted by 0.05082. In such a way that the expression (2), applied to the data under consideration in this work will be as is shown below, in order to extract the index for each university, allowing us to position it in the ranking.
The ranking of the Colombian state HEI, shown in
Table 12, was achieved in accordance with the I
AFM of the previous table. The determination of the Percentage of the Resources, established in Article 87 of Law 30 from 1992, allocated to each HEI is obtained as the percentage of the I
AFM of each HEI of the total sum of the I
AFM of all the HEI (1277.0466). That is to say, the percentage of the total general sum of the I
AFM is considered as a proxy for the resources to be allocated to each HEI.
The results obtained by way of the application of the IAFM place, according to the proposed index, the universities of Pacífico, Guajira, Chocó, Cesar, UFPS-Ocaña, Cundinamarca and Pamplona as the lowest in performance. In this sense, this is consistent with the abandonment on the part of the national government of the regions where the universities of Pacífico, Guajira and Chocó are located. We must bear in mind that the first dimension of the MFA, which accounts for 52.09% of the variability which exists in the data, is strongly related with Achievement and the Resources available to each of the HEI in order to carry out their functions.