Ali K, Slade A, Kay E J, Zahra D, Chatterjee A, Tredwin C
Peninsula Dental School, Plymouth University, Plymouth, UK.
Primary Care Clinical Sciences, Institute of Applied Health Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.
Eur J Dent Educ. 2017 Nov;21(4):e135-e141. doi: 10.1111/eje.12236. Epub 2016 Sep 19.
The aim of this study was to develop a valid and reliable scale to measure preparedness of new dental graduates.
The scale development and validation was carried out using the Rasch measurement model. Following a pilot and pre-testing of the scale, a national study was undertaken with undergraduate students from all dental schools as well as foundation dentists in UK.
To examine the internal validity of the scale, we conducted a Rasch analysis. External validity of the scale was checked through validation with a range of stakeholders. An excellent fit to the Rasch model provided evidence of internal construct validity. The scale demonstrated invariance, ordered thresholds and lack of differential item functioning. Unidimensionality of the scale was confirmed by independent t-tests. The PSI value was 0.877, indicating a good degree of person separation and internal consistency. Test-retest reliability of the scale was also established.
The preparedness scale developed in this project reflects innovative research using a systematic approach and employment of modern psychometric methods. The scale can be used for assessment of the preparedness of undergraduate students by dental educators and potential employers as well as by the student for self-assessment.
本研究的目的是开发一种有效且可靠的量表，以衡量新毕业牙科学生的准备情况。
使用拉施测量模型进行量表的开发和验证。在对量表进行试点和预测试后，对英国所有牙科学院的本科生以及基础牙医进行了一项全国性研究。
为检验量表的内部效度，我们进行了拉施分析。通过与一系列利益相关者进行验证来检查量表的外部效度。与拉施模型的良好拟合提供了内部结构效度的证据。该量表显示出不变性、有序阈值且不存在项目功能差异。通过独立t检验证实了量表的单维度性。PSI值为0.877，表明人员区分度和内部一致性程度良好。还建立了量表的重测信度。
本项目开发的准备情况量表反映了采用系统方法和现代心理测量方法的创新性研究。该量表可用于牙科教育工作者、潜在雇主对本科生准备情况的评估，也可用于学生的自我评估。
