- Research article
- Open Access
Translation, cross-cultural adaption and measurement properties of the evidence-based practice profile
BMC Research Notes volume 10, Article number: 44 (2017)
The evidence-based practice profile (EBP2) questionnaire assesses students’ self-reported knowledge, behaviour and attitudes related to evidence-based practice. The aim of this study was to translate and cross-culturally adapt EBP2 into Norwegian and to evaluate the reliability, validity and responsiveness of the Norwegian version.
EBP2 was translated and cross-culturally adapted using recommended methodology. Face validity and feasibility were evaluated in a pilot on bachelor students and health and social workers (n = 18). Content validity was evaluated by an expert panel. Nursing students (n = 96), social educator students (n = 27), and health and social workers (n = 26) evaluated the instrument’s measurement properties. Cronbach’s alpha was calculated to determine internal consistency. Test–retest reliability was evaluated using the intra-class correlation coefficient (ICC) and standard error of measurement (SEM). Discriminative validity was assessed by independent sample t test. A confirmatory factor analysis (CFA) was performed to assess the structural validity of a five-factor model (Relevance, Sympathy, Terminology, Practice and Confidence) using the comparative fit index (CFI) and the root mean square error of approximation (RMSEA). A priori hypotheses on effect sizes and P values were formulated to evaluate the instrument’s responsiveness.
The forward–backward translation was repeated three times before arriving at an acceptable version. Eleven of 58 items were re-worded. Face validity and content validity were confirmed. Cronbach’s alpha was 0.90 or higher for all domains except Sympathy (0.66). ICC ranged from 0.45 (Practice) to 0.79 (Terminology) and SEM from 0.29 (Relevance) to 0.44 (Practice). There was a significant mean difference between exposure and no exposure to EBP for the domains Relevance, Terminology and Confidence. The CFA did not indicate an acceptable five-factor model fit (CFI = 0.69, RMSEA = 0.09). Responsiveness was as expected or better for all domains except Sympathy.
The cross-culturally adapted EBP2-Norwegian version was valid and reliable for the domains Relevance, Terminology and Confidence, and responsive to change for all domains, except Sympathy. Further development of the instrument’s items are needed to enhance the instruments reliability for the domains Practice and Sympathy.
Evidence-based practice (EBP) is embedded in health policy and healthcare professionals are increasingly expected to inform their practice by evidence . EBP is a systematic approach for making clinical decisions where current best available research evidence is integrated with clinical experience and patient preferences, within a context of available resources . This involves the five steps model of EBP: asking clinical questions, searching for and appraising research evidence, integrating the evidence into clinical practice and evaluating performance . However, the implementation of EBP is deficient and there is a gap between best practice and delivered health care . Lack of training is one barrier for implementing EBP [4–6].
EBP training was initially focused on upskilling healthcare professionals within the health workplace [7, 8]. Increasingly, the awareness of EBP teaching among undergraduate students has grown [9, 10]. An international curriculum framework for EBP and recommendations for EBP teaching and education have been described in the Sicily consensus statement on EBP . This consensus statement recommends that teaching in EBP should be grounded in the five step model of EBP. Another recommendation is that EBP should be a basic and essential component of healthcare curricula [2, 11].
The integration of EBP in undergraduate healthcare education requires instruments to assess EBP competence and performance . However, systematic reviews over such tools have mostly identified instruments developed for healthcare professionals and medical students [9, 12–14]. In addition, a limited number of instruments have established measurement properties [12, 13, 15] and few measure all five steps of EBP [12, 14, 15].
The evidence-based practice profile (EBP2) questionnaire, is a tool that assesses EBP knowledge, attitudes and behaviour among healthcare students . It was developed in Australia by McEvoy et al.  and validated for students and healthcare professionals in different healthcare disciplines. The EBP2 is a self-reported instrument with acceptable measurement properties. It was the only identified tool that examined the principles of EBP and the five steps of EBP, and suitable for measuring EBP across health professions. The aim of this study was to translate and cross-culturally adapt EBP2 into Norwegian and to evaluate the reliability, validity and responsiveness of the Norwegian version.
We translated and cross-culturally adapted the EBP2 questionnaire into Norwegian following recommended methodology [16–18]. The consensus-based standards for the selection of health measurement instruments (COSMIN) checklist was used as a framework to guide our choices of measurement properties and parameters [19, 20].
The original instrument
EBP2 was originally composed by collating characteristics of EBP from previous existing self-report questionnaires, identified by a systematic review of the literature . The measurement properties were tested across a range of health professionals, academics, and students within health or non-health background. The questionnaire consists of 74 items, 58 domain items and 16 non-domain items. In addition, 13 items address the respondents’ demographic characteristics. The respondents indicate their scores on a 5-point Likert scale, and the questionnaire takes 10–12 min to complete.
An exploratory factor analysis (EFA) revealed the presence of the five domains Relevance, Sympathy, Terminology, Practice and Confidence . Relevance (14 items) refers to the value, emphasis and importance placed on EBP, Sympathy (7 items) refers to the individual’s perception of the compatibility of EBP with professional work, Terminology (17 items) refers to the understanding of common research terms, Practice (9 items) refers to the use of EBP in clinical situations and Confidence (11 items) refers to the perception of an individual’s ability with EBP skills [7, 21]. The instrument is multidimensional with each domain score calculated as the sum of all items in each domain, and each item weighted equally. The domain of Sympathy is negatively keyed .
The EBP2 measurement properties confirmed good internal consistency and test–retest reliability . Convergent validity was tested by comparing EBP2 to the 24-item Upton & Upton questionnaire . The Upton & Upton questionnaire covered three of the five factors in EBP2 (Practice, Confidence and Sympathy) and the EBP2 questionnaire demonstrated good convergent validity for the three comparable factors . The EBP2 distinguished between groups exposed to EBP and unexposed groups for three of the domains (Relevance, Terminology and Confidence) .
Translation and cross-cultural adaption process
Permission to translate the EBP2 into Norwegian was granted from the copyright holder. Following recommended methodology [16–18], two bilingual translators (KBT, HS), with expertise in the construct measured and whose native language was Norwegian, translated the questionnaire independently of each other. The translators aimed at a conceptual and cultural equivalence, rather than a word-for-word translation. The forward translations were reviewed and discussed by an expert panel that consisted of a professor in EBP (MWN), an assistant professor (AKS) and a master student (KBT). Translators and members of the expert panel were fluent in both Norwegian and English.
The expert panel agreed on a version for back-translation. A professional translator (SG), whose native language was English, performed the back-translation. SG had no knowledge about the original instrument. Discrepancies between the back-translation and the original version were discussed with the copyright holder. The forward–backward translation process was repeated three times until an acceptable version was agreed upon by the expert panel and the copyright holder.
We pilot tested the comprehension of the translated version of EBP2 on 18 participants from five different health and social professions (Table 1). Nine of these participants were considered experts in EBP. All participants completed the questionnaire while they read aloud the item response options and their own choice of answer. After completion, the participants were interviewed by KBT to elaborate on items or response options that were unclear. The data from the interviews were organised and summarised using “The Problem Respond Matrix” . The Problem Respond Matrix was developed to standardise the analysis of cognitive data and can be used to identify items that are unclear to respondents.
Evaluation of measurement properties
Participants and data collection
The total number of eligible participants was 247, representing bachelor students in nursing (n = 152) and social education (n = 63) from a large University College in Norway, and health and social workers from a local hospital (n = 32). Second year nursing students attending an EBP course, were recruited to evaluate the questionnaire’s responsiveness. The EBP course was equivalent to 5 ECTS credits (The European Credit Transfer and Accumulation System)  and emphasised the acquisition of knowledge and skills in the principles of EBP and the five-step EBP model. The 3-week course was clinically integrated and students were formally assessed at the end of the course. Second year social educator students attending a course without EBP exposure and clinical health and social workers from a dayshift were enrolled to evaluate test–retest reliability.
The bachelor students were recruited at the start of a classroom session and the health and social workers at a shift handover. Data were collected from January to April 2014. The questionnaire was answered twice by all participants with a time interval of 3 weeks for the test–retest evaluation among social educator students and health and social workers, and with a time interval of 4 weeks for the responsiveness evaluation among nursing students. The test conditions were similar at both measurement times. The questionnaires were administered independently of each other. Participants who answered the questionnaire twice and had less than 25% missing items were included.
Statistical analyses were performed using IBM SPSS Statistics version 22  and R . As in the evaluation of the original EBP2 only domain items were included in the analyses . The level of significance was set at 0.05. Respondents with more than 25% missing values were excluded from all analyses, following the procedure reported by McEvoy et al. . Respondents with more than 20% missing values in one domain were excluded from analysis of that specific domain.
Reliability was assessed by internal consistency, test–retest reliability and measurement error. For internal consistency, Cronbach’s alpha was applied for every domain and was considered good between 0.70 and 0.90 . Intraclass correlation coefficient (ICC) determined the test–retest reliability (intra-rater reliability), using a two-way random model, absolute agreement. ICC was calculated for each item and each domain, and ICC > 0.70 was deemed acceptable . Cohen’s linear-weighted kappa was calculated for each item. Minimum acceptable kappa value was 0.60, while values of 0.75 or higher were considered good [24, 28]. Measurement error was expressed as standard error of measurement (SEM) using the formula SEM = SD/√2. The larger the SEM, the lower the test reliability and the less precision in the measures taken and scores obtained .
Discriminative validity for levels of EBP exposure was assessed by independent sample t test. Measurements obtained from the nursing students after participation in a course in EBP (5 ECTS) were compared to re-test measurements among social educator students and health and social workers without this course. Structural validity was assessed by factor analysis. Confirmatory factor analysis (CFA) was performed to test whether the data fit the original five-factor structure. To evaluate model fit we used the comparative fit index (CFI), the root mean square error of approximation (RMSEA) and the standardized root mean square residual (SRMR). Guidelines suggest that models with CFI close to 0.95 or higher, RMSEA close to 0.06 or lower and SRMR close to 0.08 or lower represent a good-fitting model .
We formulated a priori hypotheses on Effect Size (ES) and Paired t test results (P value) to measure the questionnaire’s responsiveness. Based on the cohort of Long et al. , we hypothesized a smaller ES in our study due to our 3-week course as opposed to 13-weeks in Long et al. Thus, we hypothesized ES to be larger than moderate at Relevance, larger than small at Sympathy, larger than moderate at Terminology, less than small at Practice and larger than small at Confidence. ES was considered large if 0.8, moderate if 0.5 or small if 0.2 . We expected no change in the ES for the domain Practice, as participants were asked about EBP activities in the past year.
Translation and cross-cultural adaption
The forward–backward translation was repeated three times before arriving at an acceptable version. “The Problem Respond Matrix” showed that eleven items were unclear or challenging to understand (the matrix is available on request). These items were re-worded after consulting the copyright holder.
The pilot participants with expertise in EBP (n = 9) confirmed face validity. The expert panel assessed content validity and found the questionnaire, questions and rating scale clinically reasonable and relevant to the area of applicability. The layout of the EBP2-Norwegian version is similar to the original with the same number of items and demographic questions.
Evaluation of measurement properties
A total of 247 individuals were eligible for participation. Among the eligible students (n = 215), 188 (87%) met for the first teaching session and answered the questionnaire. The study included 149 participants responding at both measurements: 96 nursing students testing the questionnaire’s responsiveness, and 27 social educator students and 26 health and social workers testing test–retest reliability (Fig. 1). We excluded participants who did not meet for the retest (n = 38) and respondents with more than 25% missing items (n = 1).
Most of the participants were females (87%). The mean age was 28.2 years (range 20–61) (Table 2). The average number of items with missing values was 0.7 (SD = 0.9) per participant. No items had more than 2.7% missing values.
Cronbach’s alpha for the five domains ranged from 0.49 (Sympathy) to 0.92 (Terminology) on the first test. On the second test, Cronbach’s alpha ranged from 0.66 (Sympathy) to 0.94 (Terminology and Confidence) (Table 3).
Table 4 shows the results from the analyses of test–retest reliability. ICC ranged from 0.45 (Practice) to 0.79 (Terminology). Linear-weighted kappa for single items ranged from −0.02 (Sympathy) to 0.68 (Terminology) and SEM values varied from 0.29 (Relevance) to 0.44 (Practice).
There was a significant mean difference between exposure and no exposure to EBP for the domains Relevance, Terminology and Confidence (Table 5). The CFA showed that the CFI of the entire model was 0.59 on the first test and 0.69 on the second test. Its RMSEA was 0.090 (95% CI 0.085–0.094) and 0.089 (95% CI 0.084–0.094) while the SRMR was 0.098 and 0.095.
Statistically significant mean differences comparing pre- and post-EBP course measurements were observed for all domains except Sympathy. ES values were as expected or better for the domains Relevance, Terminology, Practice and Confidence, but lower for Sympathy (Table 6).
The EBP2 was translated and cross-culturally validated into Norwegian, using acknowledged standards. The EBP2-Norwegian version was found to be a reliable tool for measuring three of the five domains, namely Relevance, Terminology and Confidence. Further, the EBP2-Norwegian version was able to detect a change after EBP exposure in all domains, except for Sympathy. Content validity was established. Discriminative validity was verified for Relevance, Terminology and Confidence, but structural validity did not confirm the original five-factor model.
In our study, the domain Sympathy revealed low reliability and poor responsiveness. In the evaluation of the original EBP2 the measurement properties were also poorest for Sympathy, although with better results . While this domain consists of the smallest number of items, a likely explanation for inadequate internal consistency may be poor interrelatedness among the items for this domain. Furthermore, Sympathy consists of negatively worded items with reversed scores. Although reversed score items serve the useful function to disrupt undesirable response sets, they may confuse respondents if the altered direction of the wording goes unnoticed . In addition, the negatively worded items were more challenging to translate than the others, and it might be that the Norwegian translation did not fully capture the English phrasing.
Test–retest reliability was low for the domains Sympathy and Practice. It is possible that the inconsistency we observed relates to raised EBP consciousness between the measurement periods, through exposure to questions, reflection and better understanding . However, both domains refer to the use of EBP in clinical situations and the compatibility of EBP with professional work . They rely on an understanding of EBP concepts and day-to-day practical incorporation of EBP, and it may be that the inconsistency we found reflects the homogeneity in our sample and its diverse familiarity with EBP concepts. A further exploration with a larger and more heterogeneous sample could determine if prerequisite EBP acquaintance is essential to fully understand the questions. Nonetheless, the results from the test–retest reliability analyses may be used to shape item-retention decisions, by performing analyses of the items’ ICC values, refining item wording with the target population through cognitive interviews and asking an expert panel to consider content validity . A review for potential cultural, contextual, translational and interpretational limitations of the items on the EBP2-Norwegian version, with emphasis on the domains Sympathy and Practice is essential.
Norwegian health and social workers with experience in EBP confirmed face and content validity on the EBP2-Norwegian version. As the original scale, the EBP2-Norwegian version discriminated between low and high exposure of EBP for Relevance, Terminology and Confidence. Moreover, the number of missing items was low and did not indicate problems with the instrument, like incomprehension or a poor fit between answers and response options . This suggests that the participants found the EBP2-Norwegian version feasible. Still, the CFA did not confirm the original five-factor model.
As hypothesized, the domains most likely to be affected by the 3 week EBP course were Relevance and Terminology. For these domains, ES was larger than expected. In addition, we observed a larger change in ES for Confidence than predicted. We hypothesized a smaller ES than observed by Long et al. , since our students participated in a 3-week EBP course and the students in the previous study received a 13-week EBP course. Interestingly, the EBP course in our study fulfills the recommendations for EBP teaching, like clinical integration, multifacteted teaching strategies and formal assessment . It is possible that we underestimated the value of these important aspects when we formulated the a priori hypotheses on ES.
One strength of this study is the application of recommended frameworks [16, 35] to guide a transparent translation, cross-cultural adaption, evaluation and reporting of measurement properties. Our sample size was adequate for evaluation of internal consistency, test–retest reliability, discriminative validity and responsiveness. Still, according to de Vet  there should be a minimum of 100 participants, but preferably four to ten participants per item to perform a satisfactory CFA . Our sample size of 149 participants may therefore be too small for valid fit measures in the CFA analysis. Furthermore, bachelor students from two different health and social studies programmes were included in the Norwegian study, compared to students from five different health programs in the Australian study . A larger, more heterogeneous sample could have improved the methodological information of the five-factor model.
To assess EBP competence in all five EBP steps with one instrument is a challenge [15, 37]. Self-reported competence in EBP may cause respondents to over-estimate their actual competence , and the most common way to measure EBP learning has been to evaluate attitudes and self-efficacy with self-reported instruments . According to the CREATE framework (classification rubric for EBP assessment tools in education) actual EBP knowledge, skills and behaviour need to be assessed through cognitive testing, performance assessment and activity monitoring . Hence, the limitations of the EBP2 tool should ideally be triangulated with additional information gained from instruments assessing actual knowledge and skills.
EBP education is increasingly common across clinical settings and higher educational programmes. Still, the possibility to measure the impact of EBP education has been limited to a few validated tools. With the cross-cultural adaption and measurement evaluation of the EBP2-Norwegian version our study adds knowledge to this subject.
The measurement properties of EBP2-Norwegian version was reliable and valid for the domains Relevance, Terminology and Confidence. Further research is needed to appraise the domains Sympathy and Practice. We recommend further studies of EBP2-Norwegian version with a larger and more heterogeneous sample. We also recommend further linguistic improvement of the questionnaire by using the results from testing test–retest reliability to shape the item-retention decisions.
- EBP2 :
the evidence-based practice profile
the consensus-based standards for the selection of health measurement instruments
exploratory factor analysis
Kristine Berg Titlestad
Monica Wammen Nortvedt
Anne Kristin Snibsoer
the European credit transfer and accumulation system
intraclass correlation coefficient
standard error of measurement
confirmatory factor analysis
comparative fit index
root mean square error of approximation
standardized root mean square residual
the Norwegian social science data services
the classification rubric for EBP assessment tools in education
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KBT, AKS, BE, BG and MWN made contribution to the conception and the design of the study. HS constructed the search strategies used to identify relevant instruments. HS and KBT translated the instrument into Norwegian. KBT conducted the survey and acquired the data. KBT, AKS and BE conducted the data analysis. All authors participated in the interpretation of results. KBT drafted the manuscript. All authors read, critically revised, and approved the final manuscript. All authors’ have agreed to be accountable for all aspects of the work. All authors read and approved the final manuscript.
Kristine Berg Titlestad (KBT), M.Sc., is an Assistant Professor at the Institute of Social Work and Social Education, Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Bergen, Norway. Anne Kristin Snibsoer (AKS), M.Sc., RN, is an Assistant Professor at Centre for Evidence-Based Practice, Western Norway University of Applied Sciences, Bergen, Norway. Hilde Stromme (HS), M.Sc., Librarian, is a Senior Adviser at The Norwegian Institute of Public Health, Oslo, Norway. Monica Wammen Nortvedt (MWN), Ph.D., RN, Professor, Dean, Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Bergen, Norway. Birgitte Graverholt (BG), RN, Ph.D., is the Head of Centre for Evidence-based Practice, Western Norway University of Applied Sciences, Bergen Norway. Birgitte Espehaug (BE), Ph.D., Statistician, is a Professor at Centre for Evidence-Based Practice, Western Norway University of Applied Sciences, Bergen, Norway.
The authors would like to thank all the participants of this study. Special thanks to Dr. Maureen McEvoy, for corresponding with the authors and answering questions about the original version of the EBP2. Thanks to Kjersti Solvaag, for collaboration on how to understand the COSMIN methodology. Furthermore, we thank Simon Goudie, who is a professional research editor, for participating in the forward–backward translation procedure.
The authors declare that they have no competing interests.
Availability of data and materials
The data supporting the conclusions of this article are available for authorized researchers upon request from the corresponding author.
Ethics approval and consent to participate
The participants were informed verbally and in writing about the purpose of the study. The survey was voluntary, and return of the questionnaires was considered consent of participation. Data were treated confidentially and stored in the research server at the University College. The Norwegian Social Science Data Services (NSD) granted approval of the study in January 2014 (reference number 36988).
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Titlestad, K.B., Snibsoer, A.K., Stromme, H. et al. Translation, cross-cultural adaption and measurement properties of the evidence-based practice profile. BMC Res Notes 10, 44 (2017) doi:10.1186/s13104-017-2373-7
- Evidence-based practice