Spradley & Jantz metric sexing method were validated on which populations?

• A. European & Asian
• B. American Black & White
• C. African & Caucasian
• D. Native American & Pacific Islander

Answer: (B)

Metric sexing methods rely on population-specific data, so the accuracy depends on the group used to derive and test the method. Spradley and Jantz developed a skull metric sexing method and validated it on American Black and White individuals. They used known-sex skulls from these populations to build discriminant functions and then tested the method within those groups, showing reliable sex estimation for American Black and White skulls. Because validation data come from those populations, applying the method to other groups—like Native American, Pacific Islander, or European/Asian populations—would require separate validation to ensure accuracy.