Answer:
African Americans experienced stereotype threat.
Step-by-step explanation:
In a series of experiments performed by Steele and Aronson in 1995, they had subjects from both African-American and white descent to a partake in a verbal test.
The verbal test was divided into two groups, with one described as being a valid measure of intelligence while the second was defined as not reliable in terms of measuring intelligence.
With this bias in mind, the African-Americans performed poorly in the former condition because they experienced stereotype threat which was as a result of decades of being told they were not smart enough or as intelligent as whites.