English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report the results of statistical analysis performed on course grades forcalculus-based introductory physics for data collected over a four-year period.We consider two important categories of scores: proctored (in-class proctoredexams only) and proctored plus out-of-class (in-class proctored exams plusout-of-class assignments). The analysis revealed significant grade inflation inthe proctored plus out-of-class scores. Quantile plots were used to compare theobserved data and data modeled using the normal distribution. These plotsrevealed negligible correlation between the observed and modeled data for theproctored plus out-of-class scores, while a strong correlation is observed forthe proctored scores. Using the proctored grade distribution as a reference, weperformed goodness-of-fit tests using the Bayesian probability fit and theoriginal reference proportions. Using the expected counts from the twodifferent methods, we found p-values of 0.023 and 0.008. Both p-values supportthe hypothesis that there is significant difference in proctored plusout-of-class grade distribution compared to the reference. Further analysisshowed that approximately 25% of all grades are shifted towards higher grades.Our studies clearly show that grade inflation induced by out-of-classassignments is a crucial issue in assessment that has to be addressed. Bycomparing the degree of inflation in our grade distribution with the nationalaverage, we found it to be about 50% less severe.

Grade inflation in introductory physics: the influence of out-of-class assignments