What is the test for admitting evidence over relevance and undue prejudice under the deferential abuse of discretion standard?

We review the trial court's admission of evidence over relevance and undue prejudice objections under the deferential abuse of discretion standard. (People v. Carrington (2009) 47 Cal.4th 145, 195.)

Evidence may be unduly prejudicial if it "'"uniquely tends to evoke an emotional bias against a party as an individual,"'" or if it may cause the jury to "'"'prejudg[e]' a person or cause on the basis of extraneous factors."'" (People v. Cowan (2010) 50 Cal.4th 401, 475.)