Thomas Kuhn and Science Education: Learning from the Past and the Importance of History and Philosophy of Science.

Beginning 60 years ago, Thomas Kuhn has had a significant impact across the academy and on culture more widely. And he had a great impact on science education research, theorising, and pedagogy. For the majority of educators, the second edition (1970) of his Structure of Scientific Revolutions (Kuhn, 1970a) articulated the very nature of the science, the discipline they were teaching. More particularly, Kuhn's book directly influenced four burgeoning research fields in science education: Children's Conceptual Change, Constructivism, Science-Technology-Society studies, and Cultural Studies of Science Education. This paper looks back to the Kuhnian years in science education and to the long shadow they cast. The discipline of science education needs to learn from its past so that comparable mistakes might be averted in the future. Kuhn's influence was good and bad. Good, that he brought HPS to so many; bad, that, on key points, his account of science was flawed. This paper will document the book's two fundamental errors: namely, its Kantian-influenced ontological idealism and its claims of incommensurability between competing paradigms. Both had significant flow-on effects. Although the book had many positive features, this paper will document how most of these ideas and insights were well established in HPS literature at the time of its 1962 publication. Kuhn was not trained in philosophy, he was not part of the HPS tradition, and to the detriment of all, he did not engage with it. This matters, because before publication he could have abandoned, modified, or refined much of his 'revolutionary' text. Something that he subsequently did, but this amounted to closing the gate after the horse had bolted. In particular, the education horse had well and truly bolted. While educators were rushing to adopt Kuhn, many philosophers, historians, and sociologists were rejecting him. Kuhn did modify and 'walk back' many of the head-turning, but erroneous, claims of Structure. But his retreat went largely unnoticed in education, and so the original, deeply flawed Structure affected the four above-mentioned central research fields. The most important lesson to be learnt from science education's uncritical embrace of Kuhn and Kuhnianism is that the problems arose not from personal inadequacies; individuals are not to blame. There was a systematic, disciplinary deficiency. This needs to be addressed by raising the level of philosophical competence in the discipline, beginning with the inclusion of HPS in teacher education and graduate programmes.

Development and Validation of the Foot Union Scoring Evaluation Tool for Arthrodesis of Foot Structures.

Reliable evaluation of osseous consolidation after pedal arthrodesis can be difficult, and the presence or absence of radiographic healing often dictates care. Plain radiographs remain the mainstay imaging tool owing to their cost, efficiency, and low radiation exposure. Applying radiographic parameters that can reliably determine osseous healing is essential. However, currently, no reliable or validated measures are available to determine osseous union of any joint in the foot or ankle. The purpose of the present study was to develop a radiographic healing scoring system that would enhance the diagnostic healing assessment after joint arthrodesis of the foot or ankle. We adapted several existing scales previously validated for fracture healing in the leg, because no study has attempted to apply this to a joint fusion model. A total of 150 cases were evaluated by 6 blinded assessors to test the interrater reliability of the subjective healing assessment compared with the proposed scoring system. The radiographs were classified by the postoperative period: ≤4 weeks, 5 to 12 weeks, and >12 weeks. The initial proposed scale was found to have high interrater reliability but was burdensome. Using a priori item reduction protocols, a limited 5-item scale further improved the internal consistency and reduced the burden. The result was excellent interrater reliability (α = 0.978, standard deviation 0.02, 95% confidence interval 0.96 to 0.99) among all assessors compared with the reduced reliability (α = 0.752) for subjective arthrodesis healing. Intrarater reliability was also found to be superior using a test-retest method. The reliability of this system appeared superior to the subjective assessment of arthrodesis healing, even in the absence of clinical correlates, after foot arthrodesis.

Radiographic Union Scoring Scale for Determining Consolidation Rates in the Calcaneus.

The reliable evaluation of osseous consolidation after hindfoot osteotomy can be difficult. Concomitant hindfoot osteotomies often dictate the advancement of weightbearing, and radiographs are the mainstay imaging tool owing to cost, efficiency, and radiation exposure. Understanding the radiographic parameters that can be used to reliably determine osseous healing is paramount. However, currently, no reliable or validated method is available to determine osseous healing of hindfoot osteotomies in irregular bones of the foot. The purpose of the present study was to develop a radiographic healing scoring system that would enhance the diagnostic healing assessment after elective calcaneal osteotomy. We adapted existing orthopedic scales validated for healing in the leg for application in the irregular bones of the foot. A total of 168 cases were evaluated by 6 blinded assessors to test the interrater reliability of subjective healing assessment compared with the proposed scoring system. The radiographs were classified by postoperative period: ≤4 weeks, 5 to 12 weeks, and >12 weeks. The proposed scale had high interrater reliability but was burdensome. Using a priori item reduction protocols, a limited 6-item scale further improved internal consistency and reduced the burden. The result was excellent interrater reliability (α = 0.98, standard deviation 0.02, 95% confidence interval 0.91 to 0.96) among all assessors when using the scoring scale compared with unacceptable reliability (α = 0.438) for subjective osteotomy healing. The reliability of our system appeared superior to that of subjective assessment of osseous healing alone, even in the absence of clinical correlates after osteotomy of the calcaneus.