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By now, even the American Psychological Association's Ethical Principles of Psychologists and Code of Conduct direct attention towards the implications of test norm obsolescence [14], [15].
Similar guidelines of national professional associations have also been established, as for instance the demand of the two biggest German professional associations of psychologists to evaluate every psychometric ability measure at least every eight years with respect to test norm obsolescence [16].
Such a test norm at the European level would certainly be desirable.
However, the effect sizes indicated very large improvements by test norm standards that most likely could not fully be explained by effects of repeated testing alone.
It has been shown using a propanol-based hand rub that the four test bacteria of this test norm cover the whole spectrum of nosocomial bacterial strains and clinical isolates including emerging pathogens [ 7].
In the European test hierarchy for chemical disinfectants and antiseptics, stricter reduction factors of ≥ 5 log units for bacteria and ≥ 4 log units for fungi are recommended in each test norm regardless of the type of test (quantitative suspension test or practical setting).
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We present a computer package designed to generate and test norm-conserving pseudo-potentials within Density Functional Theory.
A recent examination of the test norms revealed a significant age related floor effect already emerging on Faces I (immediate recall), implying excessive difficulty in the acquisition phase among unimpaired older adults.
In addition, an examination of the descriptive statistics demonstrated that the means and standard deviations of the study subjects and the test norms of worldwide test taker groups for the two tests were only two points apart and were not practically different.
Scaled scores were derived using UK test norms.
Scores at T1 were compared to test norms (independent samples test).
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