In 1924, IQ test data was used as "scientific evidence" allowing the US Government to limit immigration and justify segregation. This statement is:

The statement regarding the use of IQ test data in 1924 as "scientific evidence" to justify limiting immigration and segregation is accurate. During this time, intelligence tests were being developed and applied, often reflecting the biases of the researchers. The applications of these tests were used to support eugenics policies, which advocated for selective breeding and reinforced ideas of racial superiority.

The use of IQ tests as a tool for determining the worthiness of immigrants was rooted in a misguided belief that intelligence was hereditary and could be quantified in a way that directly influenced one's value to society. Such practices reinforced segregationist policies and were used to justify discriminatory immigration laws, particularly against groups deemed to have “lower” IQ scores based on the tests.

This context helps highlight how data can be misinterpreted or misused in society to justify harmful policies, reflecting societal biases at the time. Understanding this historical misuse of psychological testing sheds light on important ethical considerations in psychology today.