The most significant characteristic of the investment interventions that are the subject of this paper is that their activation periods are one year and that their cash inflows are one-time. If there are several independent operations of this type, all those with a positive net present value, and therefore an internal rate of return that is higher than the actualization rate, will be accepted. In the case of competing operations (at certain rates of actualization), especially those whose exploitation periods are different, we may have the case that one of them is better from the aspect of net present value, and the other from the aspect of internal rate of return. The decision on their proper ranking must be based on determining the net present value for exploitation periods that are mutually equal. In the paper, we analyzed two ways of equalizing exploitation periods, the method of reciprocal interventions and the method of replacement, and obtained relevant information for their ranking, which was also confirmed by the annuity method.

Numerous studies are focused on discovering the factors involved in achieving school success or failure. Among the recognized factors are certainly the locus of control and procrastination. Research has shown that procrastination and locus of control are important indicators of school behavior, attitudes toward obligations, and indicators of school success (Sakač 2008; Košanski 2004). Therefore, this paper sought to determine the extent to which they play an important role in school success. The increasing interest in examining school success lies in being assessed as a significant factor in a child’s life. Its significance influences the development of self-confidence, satisfaction, success, and motivation. Within the research framework, school success was determined by school achievement at the end of the school year. The survey was conducted on 100 respondents of elementary school students, a sample is appropriate. During this research, the relationships between these variables were analyzed, the Anova procedure was used to analyze the data. The obtained results showed that procrastination and locus of control within this sample did not prove to be significant factors of school success.

The failure to engage in responsible behaviour is related to the inability to consider future consequences of actions. An experiment was conducted to examine whetherincreasing the vividness of the future self affects adherence and endorsement of COVID-19 safety measures. A total of 184 participants were randomly assigned to 3 groups. Depending on the experimental condition, they were tasked with writing a letter to other people (their friend), a proximal future self, and a distant future self. Participants in the distant future self and the other people conditions showed greater adherence intentions than proximal future self participants. No differences were found between the distant future self and the other people group. Further group differences were found in the endorsement of safety measures, with the distant-future self-group showing more condemnation than the other two groups. Commitment to the COVID-19 safety measures mediated the group differences on both dependent variables. The results are discussed within the framework of the Construal Level Theory and the Future Self-continuity model.

The research problem relates to the examination of the relationof socio-demographic characteristics (gender, level of education and the place where most of childhood was spent) and the self-esteem of the respondents with loneliness.In investigating this problem, the focus was primarily on the perception of the distribution of loneliness, and the examination of the relation of independent variables (socio-demographic characteristics and self-esteem) with the dependent variable (loneliness).The sample of respondents consists of 677 high school students (49.34%) and college students (50.66%) of Bosnia and Herzegovina. The range of years of subjects ranges from 15 to 23 (AS = 18.696).The results of the study show that there is a statistically significant difference in loneliness with regard to gender (U = 38672.000, Z = -6.122, p = .000), to the level of education (U = 42292.500, Z = -5.905, p = .000) and the place in which the respondents spent most of their childhood (χ2 = 9.383, df = 2, sig = .009). The results show that there is a statistically significant relation between self-esteem and loneliness (ro = -.401, sig = .000, N = 676).

Introduction: Diabetes is progressive condition which requires various ways of treatment. Adequate therapy prescribed in the right time helps patient to postpone development of complications. Adherence to complicated therapy is challenge for both patients and HCPs and is subject of research in many disciplines. Improvement in communication between HCP and patients is very important in patient’s adherence to therapy. Aim: Aim of this research was to explore validity and reliability of modified SERVQUAL instrument in attempt to explore ways of motivating diabetic patient to accept prescribed insulin therapy. Material and Methods: We used modified SERVQUAL questionnaire as instrument in the research. It was necessary to check validity and reliability of the new modified instrument. Results: Results show that modified Servqual instrument has excellent reliability (α=0.908), so we could say that it measures precisely Expectations, Perceptions and Motivation at patients. Factor analysis (EFA method) with Varimax rotation extracted 4 factors which together explain 52.902% variance of the results on this subscale. Bifactorial solution could be seen on Scree-plot diagram (break at second factor). Conclusion: Results in this research show that modified Servqual instrument which is created in order to measure expectations and perceptions of the patients is valid and reliable. Reliability and validity are proven indeed in additional dimension which was created originally for this research - motivation to accept insulin therapy.