Roberta Collins and John Aprea made 2 films together, and the 1 rated one averages 5.10, 0.61 below their career marks. The best is Caged Heat at 5.1.

Roberta Collins averages 5.35, John Aprea averages 6.07. Apart that suggests 5.71; together they average 5.10, a lift of −0.61.

Lift is the average of their films together minus the mean of their two career averages.