Sentence examples for validation is lacking from inspiring English sources

This is similar to the conclusion in the review by O'Flaherty et al. (2015, pp. 93-94), which stated that robust evidence on the effectiveness of the flipped classroom approach based on long-term or empirical validation is lacking and that better indicators for student engagement and conceptual use are needed.

Although different authors have reported the existence of CNVs in individuals from different geographical locations [29], [35], [40], [45], experimental validation is lacking for a number of the reported variants.

However this paper verified these changes via experimental PCR evidence; such validation is lacking in the Anamika paper.

Anecdotal experience also suggests an increasing use of BNP by physicians in the ICU; however, although extrapolation to other clinical settings is tempting, appropriate validation is lacking.

However, the problem is that an empirical validation is lacking for all proposed definitions of CFS [ 10] including a clinical definition of CFS [ 11].

46 However, data are conflicting, and validation is lacking for these potential biomarkers; therefore, they cannot be recommended for use in routine clinical care at present.

This study is motivated by an industrial need to better understand the vortex-induced vibration (VIV) of a curved structure subject to current flows with varying directions whose data for model calibration and validation are lacking.

Moreover, experimental validations are lacking and the authors have never evaluated and highlighted the improvements brought by the use of tomography in comparison with previous analytical models.

However, validation of models is lacking, even though models are already in use and the general idea is that each is a working model, developing over time with new ideas and information.

It has also a relatively small size, and it relies on the MDRD equation, the validation of which is lacking among African populations as well as in those with HIV.

Current genomic and proteomic research provides many candidate biomarkers, but independent validation of these biomarkers is lacking, and reproducibility is still a key concern.