In conclusion, the results obtained in this study confirm the validity of the screening instruments and diagnostic tools, while illustrating how LR is heritable and influences current quantity and drinks per drinking day in a predominantly African American cohort. This manuscript focused on LR as one of the possible reasons behind the incidence of alcohol dependence by eliciting the participation of a community sample including college students. The study met and exceeded expectations as authors did not expect heritability to be as high as 67%. This was a strong indication that level of response plays a significant role in the development of alcohol dependence among African Americans. The reason why heritability estimates are higher in this sample compared to other samples is uncertain. It may be intrinsic to the predominantly African American ethnicity in the sample.
