Regarding cultural differences in expressed emotion, which is thought to be positively correlated with schizophrenia, research has found that families have the highest percentage of expressed emotion.

Hostile

Explanation:

Expressed emotions measures family impact on it's psychiatric-patient relative.This measure is determined on how well they present the said relative who happens to be going through these psychological issues.As we have already been informed and also from research,expressed emotions has a positive correlation with schizophrenia.

From studies and research,it has been found that hostile families have the highest percentage of expressed emotions because they find hostility towards the affected patient as a remedy,but this in turn isn't the case because schizophrenia is a disorder that requires meticulous attention and thus it goes down to a long process of therepy in order to aid the patient.

Finally,there hasn't really been a final remedy to the issue of schizophrenia,so that's why family members have to be patient with their loved ones suffering from this disorder,instead of being hostile.

answer; i believe that the correct answer is (decreased)