Rapid response behaviour, a type of test disengagement, cannot be interpreted as a true indicator of the targeted constructs and may compromise score accuracy as well as score validity for interpretation. Rapid responding may be due to multiple factors for diverse populations. In this study, using Programme for International Student Assessment…

In 1986, Reactor 4 in the Chernobyl nuclear power plant exploded. Within a year of exposure to radiation poisoning the rate of cancer, particularly leukaemia and thyroid cancer, was reported as 100 times higher in children living in contaminated areas. Volunteers in more than 18 countries responded by establishing a network of recuperative…