What is the test for reversing a finding of error in the introduction of evidence in a criminal case?

We need not determine if respondent's concession of error is correct because we agree with respondent that error, if any, was not so prejudicial that reversal is required. The erroneous introduction of evidence is evaluated under the Watson (People v. Watson (1956) 46 Cal.2d 818, 836) standard. We will reverse only if it is reasonably probable the defendant would have obtained a more favorable result had the evidence been excluded. (People v. Cooper (1991) 53 Cal.3d 771, 836.)