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“A lot of catastrophising:” Standardised tests don’t show decline

A University of New England researcher has collated 25 years' worth of Australian students' test results and found there has been no significant decline in three out of the four major tests students take.
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Visual learning is currently devalued using explicit teaching approaches. This is due to statistical discrepancies of the effect size resulting from limitations to Cohen’s d which standardises and distorts sample sizes by giving samples equal weights despite big differences in sample sizes. The effect size is understated.
Humans are visual learners and there are many neurological studies which emphasise the role of brain’s visual cortex and its evolution adaptations to interpret signals from the environment. People are ‘hard-wired’ for visual learning.
Humans are not Visual Learners. Learning style theories have been shown to be invalid.
https://medium.com/illumination/youre-not-a-visual-learner-learning-styles-don-t-exist-3219ec3203e2
The PISA testing is inherently flawed, which children are chosen to be tested? What time of day are they tested? How much testing burn-out are they experiencing at that actual time? Do they care about the performing of the test or is it simply something they have to do? What are the children’s cultural backgrounds? So many aspects of the psychological are not taken into consideration. There needs to be a re-examination of the idea of testing itself and if there can actually be a test that compare