Final answer:
The stereotype that African Americans are criminal and violent is unconscious and not subject to intentional control.
Step-by-step explanation:
Based on the given sentences, it can be inferred that the stereotype that African Americans are criminal and violent is unconscious and not subject to intentional control. This means that many people hold this stereotype without being aware of it or intentionally promoting it. The sentence suggests that social psychologists have been documenting this association for almost 60 years, indicating that it is a deeply ingrained and persistent stereotype.