https://orcid.org/0000-0002-7895-6083
Figures
Abstract
The European Higher Education Area (EHEA) recommends the use of new educational methodologies and the evaluation of student satisfaction. Different instruments have been developed in Spain to evaluate different aspects such as clinical decisions and teamwork, however no instruments have been found that specifically evaluate student self-confidence and satisfaction during clinical simulation. The aim was to translate the Student Satisfaction and Self-Confidence in Learning Scale (SCLS) questionnaire into Spanish and analyse its reliability and validity and understand the level of satisfaction and self-confidence of nursing students with respect to learning in clinical simulations. The study was carried out in two phases: (1) adaptation of the questionnaire into Spanish. (2) Cross-sectional study in a sample of 489 nursing students. The reliability and exploratory and confirmatory factorial analyses were performed. To analyse the relationship of the scale scores with the socio-demographic variables, the Fisher Student T-test or the ANOVA was used. The scale demonstrated high internal consistency reliability for the total scale and each of its dimensions. Cronbach’s alpha was 0.88 (0.83 to 0.81) for each of the dimensions. The exploratory and confirmatory factor analysis showed that both the one-dimensional and two-dimensional models were acceptable. The results showed average scores above 4 for both dimensions. The SCLS-Spanish translation demonstrated evidence of its validity and reliability for use to understand the level of satisfaction and self-confidence of nursing students in clinical simulation. Clinical simulations help students to increase their levels of confidence and satisfaction, enabling them to face real scenarios in clinical practice.
Citation: Farrés-Tarafa M, Bande D, Roldán-Merino J, Hurtado-Pardos B, Biurrun-Garrido A, Molina-Raya L, et al. (2021) Reliability and validity study of the Spanish adaptation of the “Student Satisfaction and Self-Confidence in Learning Scale” (SCLS). PLoS ONE 16(7): e0255188. https://doi.org/10.1371/journal.pone.0255188
Editor: César Leal-Costa, Murcia University, SPAIN
Received: March 31, 2021; Accepted: July 11, 2021; Published: July 23, 2021
Copyright: © 2021 Farrés-Tarafa et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Data Availability: All relevant data are within the manuscript and its S1 File.
Funding: This study has been partially financed by the Campus Docent Sant Joan de Déu.
Competing interests: The authors have declared that no competing interests exist.
Introduction
The complexity of real world medical practice, high levels of patient acuity and requirements to mitigate risk and maximise safety and quality of care delivery mean that hospitals cannot maintain old on-the-job trial and error learning methods. Experimental learning and the practice of core skills is therefore now undertaken the safer setting of the simulation environment [1]. In the last decade, the use of simulation as a teaching-learning method has increased worldwide because it allowed the repetition (deliberate practice), it allowed to practice clinical cases that may not be applicable to clinical practice (variability of clinical practice) or that if they are seen they give the student a passive role (student-centred simulation) [2].
Systematic reviews have shown that Human Patient Simulation (HPS), compared to traditional educational methods, has superior results and improves student performance [3, 4].
Simulated-based learning (SBL) can improve learning compared to traditional methodologies, and its is especially effective in undergraduate students [5].
It aims to train their technical skills (procedures) and non-technical skills (decision-making, leadership, critical thinking, communication and teamwork, situational awareness, safe practice, adverse event minimization/mitigation and professionalism) [6] that will help them to transfer the knowledge learned to clinical practice. Non-technical skills can help newly qualified nurses to better understand their own role as a nurse, to know what others expect from them in professional practice, to improve their self-confidence and gain self-awarenness of their weaknesses [7]. Various studies [8–12] affirm that nursing students consider simulation to be an important methodology for their learning, that increases their satisfaction and that performing simulation activities consecutively increases their self-confidence, a sense of security which is soundly-based on the nurses ’awareness of their own capability’ which can contribute to reducing the theory-practice gap [13] On the other hand, by increasing self-confidence, it also decreases the anxiety that clinical practice can cause [14].
Therefore, it is necessary to know the level of satisfaction and degree of self-confidence that this teaching methodology generates in the student during their university education.
Due to the need to understand the degree of satisfaction and self-confidence generated by clinical simulation, in 2003, The National League for Nursing (NLN) together with Laerdal, created the instrument Nursing Student Satisfaction and Self-Confidence in Learning Scale (SCLS). It is a questionnaire consisting of 13 items [15], grouped into 2 dimensions: Satisfaction with Current Learning and self-confidence in learning during simulation.
Jeffries and Rizzolo (2007) [16] analysed the validity of the content and the reliability of the scale. The validity of the content was determined by nine clinical experts in nursing. In relation to the reliability of the scale, a Cronbach alpha of.94 was obtained for “Satisfaction with Current Learning” and an alpha of.87 for “Confidence in Learning” [16].
The (SCLS) is being used in different countries to assess the level of satisfaction and self-confidence of nursing students [17] and in multiple studies they conclude that simulation increases satisfaction and self-confidence in nursing students [11, 12, 18–20].
The improvement of student satisfaction with simulation activities motivates institutions to invest in this teaching strategy [18].
The reliability reported in the different studies performed was highly suitable with values greater than.85 [21–24].
Self-confidence is the belief that you have in your ability to succeed and that affects the effort that will be made when facing a task and the time you will persist for when a problem is encountered [25]. Therefore, it relates to the personal responsibility one has to achieve one’s goals. It is known that self-confidence is directly related to competence and success, and can interfere with the functionality of patient care. Self-confident nurses have developed their critical thinking, reflection, problem solving and decision-making skills better. Therefore, improving the self-confidence of nursing students can help in their training and thus reflect an improvement in the teaching and learning process [26].
Several instruments adequate for use to evaluate simulations have been identified in recent years [23, 27–30]. Instruments to evaluate different aspects of competencies, clinical decisions and teamwork have been developed in Spain [31–33], but only one instrument has been located that evaluates satisfaction [34]. It consists of 38 items and 8 dimensions (simulation utility, characteristics of cases and applications, communication, self-reflection on performance, increased self-confidence, relation between theory and practice, facilities and equipment and negative aspects of the simulation). However, no instrument has been found that specifically evaluates self-confidence and satisfaction of students during the clinical simulation and that can be completed in a short time.
However, it is necessary to have rigorously validated rubrics in Spain that can evaluate the effects of simulation-based activities. These instruments must be reliable and valid [35]. Since the creation of an instrument involves a high cost and requires a lot of time, the adaptation of existing instruments to another language offers several advantages. On the one hand, it reduces the cost of research, allowing the psychometric characteristics of the original instrument to be preserved and, on the other hand, it allows the results obtained to be compared, which are equally valid and reliable, with other national and international studies that have used the same instrument [36].
The objective of this study was to translate the Student Satisfaction and Self-Confidence in Learning Scale (SCLS) questionnaire into Spanish and analyse its reliability and validity and understand the level of satisfaction and self-confidence of nursing degree students with respect to learning in clinical simulations.
Methods
Study design
The study was carried out in two phases that consisted of the translation, adaptation to Spanish and validation of the scale, through a team of nurses skilled in simulation, followed by a descriptive and correlational study.
Study setting and sample
The study sample consisted of 489 nursing students enrolled during the 2018–19 academic year. Non-probabilistic convenience sampling was used. The inclusion criteria were the following: to have performed some clinical simulation during the course and to have given their consent to participate in the study. Only those students who were not present at the time of handing out the surveys were excluded.
The recommendations of Comrey and Lee were followed to calculate the sample size [37] for validation studies, which suggest a graduated scale to determine the sample size: 100 = poor, 200 = fair, 300 = good, 500 = very good and 1,000 = excellent. In this study it was agreed to include approximately 500 participants from the different courses.
Variables and source of information
All items related to the Nursing Student Satisfaction and Self-Confidence in Learning Scale (SCLS) questionnaire were picked as variables. It is a questionnaire consisting of 13 items, divided into 2 different dimensions (Attitudes towards satisfaction with instruction and Self-confidence in learning in simulation [15]. Each item is evaluated using a Likert scale with five possible answers, where 1) strongly disagree, 2) disagree, 3) undecided, 4) agree, and 5) strongly agree. The sum of the scores of all the items for each dimension gives us the estimated level of satisfaction and self-confidence of the student in the learning of clinical simulation. Other socio-demographic variables were also collected, such as age, sex, academic year, teaching shift, if they were working, work shift and if they had previous work experience in the health field.
Procedure
There were two phases. The first phase consisted of translating and adapting the English version into Spanish through an independent bilingual English—Spanish, Spanish—English committee. The Standards for Educational and Psychological Testing [38] were followed throughout.
Initially 2 bilingual nurses, whose mother-tongue was Spanish carried out the translation from English to Spanish independently, without prior knowledge of the instrument or the objectives of the study. Then a committee of experts synthesized the 2 translations and created the first version of the instrument in Spanish. Later 2 nurses, whose mother-tongue was English independently retranslated the Spanish version to English.
The 2 versions obtained were compared with the original questionnaire by the same committee of experts. All agreed that the items in the Spanish version matched the original English version. However, to obtain the highest possible degree of semantic, idiomatic and conceptual equivalence, the expert committee decided to change the “teacher” to "Instructor/facilitator” on the understanding that, depending on the area of simulation where the learning is taking place, the teacher acquires one role or the other [39].
The expert committee consisted of two clinical simulation teachers accredited by the Boston Children’s Hospital, Simulator Program from Boston, two expert teachers in psychometrics and two nurses with advanced clinical practice experience.
Table 1 shows the semantic equivalence of items from English to Spanish, and the minimum and maximum scores for each dimension.
Next, the pre-test was carried out on a sample of 10 nursing students from different courses and shifts. All of them concluded that it was easy to understand and required little time for completion (between 5 and 10 minutes). Subsequently, the questionnaire was administered to the nursing students included in the sample to analyse the psychometric properties of the Spanish version and the level of satisfaction and self-confidence in learning clinical simulation. The questionnaire was administered at the end of every simulation session.
Data analysis
The internal consistency of the questionnaire was analysed using Cronbach’s alpha coefficient, considering acceptable values as those between.70 and.90 [40, 41].
A confirmatory factorial analysis was performed to analyse the validity of the construct (CFA) using the generalised least squares method. The overall fit quality was assessed using the indices: normed Chi-square, defined as the ratio between the value of the Chi-square and the number of degrees of freedom (χ2/df). Comparative Fit Index (CFI), Goodness of Fit Index (GFI), Adjusted Goodness of Fit Index (AGFI), Bentler Bonnet Normed Fit Index (BBNFI), Bentler Bonnet Non-Normed Fit Index (BBNNFI) and Root Mean Standard Error of Approximation (RMSEA). In order to consider a good overall fit, the criteria adopted were that of obtaining the following fit values: X2/df values between 2 and 6 [42]; CFI, GFI; AGFI; BBNFI and BBNNFI values ≥ 0.95 and RMSEA ≤ 0.05 [43–45].
CFA models were estimated using structural equation modelling (EQS 6.2 for Windows, Multivariate Software, Inc., Encino, CA, USA).
As the CFA suggested that a unidimensional factor solution could also be a plausive option, we computed Explained Common Variance (ECV) and Unidimensional Congruence (UniCo) indices to assess the degree of dominance of the general factor or closeness to uni-dimensionality [46]. ECV index essentially measures the proportion of common variance of the item scores that can be accounted for by the first canonical factor (i.e. the factor that explains most common variance). UniCo index is the congruence between the actual loading matrix and the loading matrix that would be obtained if the unidimensional model is true: the closer to the value of 1, the more the actual loading matrix looks like the unidimensional loading matrix. As for reference values, it has been proposed that ECV values should be in the range 0.70 to 0.85 if it is to be concluded that a solution can be treated as essentially unidimensional [46]. A value of UniCo larger than 0.95 suggests that data can be treated as essentially unidimensional [47]. Additionally, Optimal Implementation of Parallel Analysis (PA) was computed [48].
In order to explore the loading values of the items in a unidimensional solution, an exploratory factor analysis (EFA) was computed. Item scores were treated as ordered-categorical variables and the EFA was fitted to the inter-item polychoric correlation matrix [49]. The chosen fitting function was robust unweighted least squares, with mean-and-variance corrected fit statistics [50]. A single factor was extracted.
A descriptive analysis was carried out using frequencies and percentages, measures of central tendency and dispersion. To analyse the relationship of the scale scores with the socio-demographic variables, the Student T-test or the ANOVA was used.
Data analyses were performed using SPSS for Windows 22 (SPSS Institute, Chicago, IL, USA).
Ethical considerations
The study was approved by the Clinical Investigation Ethics Committee of the San Joan de Déu Foundation with the assigned code CEIC PIC-42-19. The participants were informed about the authorship and purpose of the investigation and were ensured that all the data obtained would remain confidential. They freely gave their verbal and written consent to participate in the study as volunteers.
The translation has been completed with the permission of the National League for Nursing (NLN), but NLN is not responsible for its accuracy. Any request related to the translated instrument in Spanish must be addressed to NLN. More information about research instruments and copyright is available in NLN website [http://www.nln.org/professional-development-programs/research/tools-and-instruments]. NLN holds the copyright to the original (English language) and the translated instrument in Spanish.
Results
Demographic characteristics
A total of 489 students participated in the study. The mean age was 23.2 (SD 5.1), 82.4% being women. 60.1% of the students were enrolled in the morning study schedule. 60.5% of the students declared that they are currently working and of these, 43.6% had permanent employment. 67.2% of the students declared having work experience in the health field (Table 2).
Reliability
Cronbach’s alpha internal consistency coefficient for the total questionnaire was.885, and a value of.838 was obtained for dimension D1: Satisfaction with Current Learning and a value of.812 for dimension D2: Self-confidence in Learning. Cronbach’s alpha was also calculated for each item in the questionnaire and it was not observed that the exclusion of an item would improve the internal consistency of the questionnaire in general (Table 3).
Construct validity
The factorial structure was analysed by means of a confirmatory factorial analysis in which a 2-dimensional model identical to the structure of the original version was proposed.
Parameter estimation was performed using the least squares method. Dimension 1 was the one with the greatest factorial load or saturation of its indicators. All saturations showed values larger than.30 (see Fig 1).
The Chi square test was statistically significant but the fit ratio was 4.28, so if it is between 2–6 the fit is reasonably good [51]. Likewise, both the rest of the absolute adjustment indices, as well as incremental adjustment and parsimony indexes analysed, presented the same trend, so it can be concluded that the model suitably fits (Table 4).
As can be observed in Fig 1, CFA model was adjusted for a model were the two factors correlated among them.85. As this correlation is large, a unidimensional factor model could be expected to fit properly. The ECV value was.864, the UniCo value was.965: both values suggested that there is a strong dominant factor running through all the 13 items. In addition, the first eigenvalue accounted for 55.1% of the common variance (the second eigenvalue accounted for 10.7%), and PA suggested that the unidimensional solution is the most replicable.
Goodness of fit indices for the single factor model are printed in Table 5. As can be observed in the table, the fit is not so good as the two-dimensional model tested in CFA, but it is still acceptable. The loading values of the items in the EFA ranged between.41 (item 13) and.78 (item 2). Finally, Expected At Posteriori reliability [52] of the factor was.923.
The conclusion is that both (unidimensional and bidimensional) models are acceptable. From a practical point of view, it means that researchers can compute the overall scale score (i.e., the score that is obtained using the responses to the all items), but also the score in two subscales (Satisfaction and Self-confidence) when a more detailed description of participant responses may be needed.
Personal attitudes about the instruction the student receives during their simulation activity (satisfaction with current learning and self-confidence in learning).
The average total score of the questionnaire was 54.4 (SD 6.2), with the minimum score being 19 and the maximum being 65. In order to compare the scores of the two dimensions, the average score of each dimension has been divided by the number of items that configure it. The scores were higher in dimension D1: Satisfaction with Current Learning than in D2: Self-confidence in Learning (Average 4.2, SD 0.5 and Average 4.1, SD 0.4 respectively) (Table 3).
When relating the total score of the questionnaire and the socio-demographic and labour variables of the students, only statistically significant differences were found with the teaching shift and the academic year. The total average score of the questionnaire was higher in the students who did the training in the morning shift and in the second-year students who had performed fewer clinical simulations (p = .019 and p = .032 respectively) (Table 6).
Discussion
Firstly, the study aimed to evaluate the psychometric properties of the Nursing Student Satisfaction and Self-Confidence in Learning Scale (SCLS) questionnaire in nursing degree students from Spain. The results have shown that the psychometric properties are adequate in terms of internal consistency and the validity of the construct. An important aspect to highlight in this study is the sample size, in which 489 nursing students from different academic courses have participated, a sufficient sample to perform a confirmatory factorial analysis [37]. This figure is higher than that used in different studies in which the SCLS questionnaire has been validated [35, 53–56].
In relation to the reliability of the questionnaire, a Cronbach Alpha of.885 was obtained for the overall questionnaire and greater than.81 for the two dimensions that configure it: Satisfaction and self-confidence, considering these to be appropriate values [41].
This instrument has been translated into different languages and for different countries (Turkish, Chinese, Portuguese, and Norwegian), where Cronbach’s alpha was also greater than.75 in all cases for the total scale and for each dimension, except for the study conducted in Norway where it was 0.64 [55, 56].
In 2014 [17] conducted the first study, to learn the psychometric properties of the Nursing Student Satisfaction and Self-Confidence in Learning Scale (SCLS) questionnaire. In this study reliability was analysed and an exploratory factorial analysis was performed, where 2 dimensions were identified: satisfaction and self-confidence that reported reliability for each of them as.92 and.83, similar results to those found in our study.
With respect to the validity of the construct, Almeida et al. and Tosterud et al. [54, 55] performed an exploratory factorial analysis. In both studies they identified the two dimensions and they verified that the indices obtained fit the model properly [54–56].
In our study, a confirmatory factorial analysis was carried out using the generalised least squares method in order to determine if the scores reproduced the two-dimensional structure on which the original questionnaire is based. The confirmatory factorial analysis showed a bi-factorial model in which all the items presented an adequate factorial load. With respect to the fit indices analysed for the model, both the absolute fit indices: GFI (Goodness of Fit Index), RMSEA (Root Mean Square Error of Approximation), and the incremental fit indices: AGFI (Adjusted Goodness of Fit Index), BBNFI (Bentler Bonnet Normed Fit Index), BBNNFI (Bentler Bonnet Non Normed Fit Index), CFI (Comparative Fit Index) and the parsimony indices such as the normed Chi-square all present a good fit, so it can be concluded that the model suitably fits. These results are very similar to those found in the study conducted by Franklin and Chan [17, 53]. In addition, we computed an exploratory factor analysis and observed that the unidimensional factor solution is also acceptable for the test.
In the simulation, knowledge, performance in situ, the educational practices used, student satisfaction and self-assessment, as well as critical thinking ability and self-confidence can be assessed [8, 57]. A systematic review found that high-fidelity simulation improves knowledge and skills but not so much self-confidence [58]. In this study, the degree of satisfaction and self-confidence obtained by nursing students after the high-fidelity clinical simulation was evaluated. The results have shown average scores above 4 for both dimensions, which shows that students satisfactorily value simulation during academic training, these results are similar to those found in other studies that also use the SCLS to assess satisfaction and self-confidence [11, 12, 18, 19, 59]. In our sociocultural context, a study also showed that satisfaction with simulation is very high (96% totally agree/In agreement) and that simulation promotes self-confidence (80,6% totally agree/In agreement) [34]. In no study have statistically significant differences been found when relating socio-demographic variables to the total score of the questionnaire. However, in our study, the teaching shift and the academic year showed significant results. This may be because the profile of students in the afternoon shift is more demanding because the vast majority are working and the average age is higher.
Limitations
Our study has certain limitations. First of all, we selected a sample of convenience from a single university in Barcelona, therefore, it is possible that our results cannot be generalised to all nursing students. However, the socio-demographic and work characteristics of the students in this study are similar to other universities in Spain.
Another limitation is that the degree of satisfaction was analysed at a given time. More research should be done to find out if self-confidence increases as the student performs more simulations.
Conclusions
The SCLS-Spanish translation demonstrated evidence of its validity and reliability for use to understand the level of satisfaction and self-confidence of nursing students in clinical simulation. Likewise, simulation as an innovative teaching methodology will enable the student’s self-confidence and satisfaction to be assessed throughout their university education.
Clinical simulations help students to increase their levels of confidence and satisfaction, enabling them to face real scenarios in clinical practice better prepared and with more confidence.
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