Saliva diagnostics have become increasingly popular due to their non-invasive nature and patient-friendly collection process. Various collection methods are available, yet these are not always well standardized for either quantitative or qualitative analysis. In line, the objective of this study was to evaluate if measured levels of various biomarkers in the saliva of healthy individuals were affected by three distinct saliva collection methods: 1) unstimulated saliva, 2) chew stimulated saliva, and 3) oral rinse. Saliva samples from 30 healthy individuals were obtained by the three collection methods. Then, the levels of various salivary biomarkers such as proteins and ions were determined. It was found that levels of various biomarkers obtained from unstimulated saliva were comparable to those in chew stimulated saliva. The levels of potassium, sodium, and amylase activity differed significantly among the three collection methods. Levels of all biomarkers measured using the oral rinse method significantly differed from those obtained from unstimulated and chew-stimulated saliva. In conclusion, both unstimulated and chew-stimulated saliva provided comparable levels for a diverse group of biomarkers. However, the results obtained from the oral rinse method significantly differed from those of unstimulated and chew-stimulated saliva, due to the diluted nature of the saliva extract.
In response to globalisation and internationalisation of both higher education and the job market, The Hague University of Applied Sciences (THUAS) has seen a considerable increase in English-medium courses, i.e. non-language subjects taught through English. Internationally, the rise of English-medium instruction (EMI) has led to research on, and discussion about the possible side-effects of a change in instructional language. More specifically, whether using a foreign language as the medium of instruction has a negative impact on teaching and learning. This paper reports the findings of a pilot research project into the implications of English-medium instruction (EMI) as perceived by students and teachers of the bachelor program Commercial Economics at the Faculty of Business, Finance and Administration at THUAS. Research methods used to collect data include face-to-face interviews with both students and lecturers involved in EMI subject courses, a student questionnaire, and lesson observations. Despite regular exposure to English and an adequate self-perceived English proficiency, results show that a considerable number of students, as well as teaching staff are experiencing difficulties with English-medium instruction and that for many EMI is not as efficient in transferring academic content as instruction in the mother tongue.
Effective teaching for democracy requires an understanding of the teaching methods and educational characteristics that are effective in interventions. In order to address this requirement, we conducted a systematic literature review. We used an extensive search syntax and snowballing method that allowed us to find n = 2093 unique publications. After a screening process, we have included 54 interventions in 51 different quantitative effect studies written between 2010 and 2020. We categorized these interventions into five types of teaching methods: instruction, small-group work, assignments, projects, and democratic decision-making. We analyzed what the educational characteristics (i.e., subject matter, classroom interaction, classroom management) of these interventions were and for which democratic competences (i.e., knowledge, attitude, skill, behavior) they were effective. Our results show that teaching methods have differential effects on democratic competences. We also discuss the robustness of these results. Our study shows that there is still much to be gained in terms of research designs, the conceptualization of democratic competences, and the description of teaching methods.
MULTIFILE
mechanism for fostering innovation competenceThis dissertation focuses on fostering students’ innovation competence in higher education. The research is aimed at developing instructional strategies based on theoretical design principles to aid teachers in higher education foster innovation competence in their classrooms and assess students’ innovation competence. The research was implemented within the existing curriculum of three Netherlands universities of applied sciences in which developing students’ innovation competence was the target learning goal. To aid innovation competence learning, an innovation competence teaching mechanism was developed following education design research steps. The research includes four independents sub-studies which used different research methods. This thesis shows that students’ innovation competence can be positively influenced by instruction. The findings of this study suggested that development of students’ innovation competence takes place through explicitly coordinated teaching and learning activities, design, assessment, and reflection. It was found that this innovation-supportive learning environment influenced the actual innovation competence of students and that the way of teaching (especially a better structured, balanced and more student-centred constructivist approach to teaching) had a positive influence on students’ development of innovation competence. This dissertation has shown that every student has the potential to be innovative, and that teachers can fulfil their role in recognizing the innovation potential of students by creating a teaching and learning environment that promotes and encourages innovation competence.
