Field Independence and Outcome in Schizophrenia: A U-Shaped Relationship

Abstract

Relationships are examined between field-independence as measured by Series III of the rod-and-frame test in 51 recently hospitalized schizophrenics and outcome 6 mo. later in terms of presence in or out of hospital. An earlier attempt to find a linear relationship between field independence and outcome had proved unsuccessful; however, on the basis of more recent findings, a U-shaped relationship, predicting a poor outcome for extremely field-dependent and extremely field-independent Ss, was predicted and found. Optimal cutting-points assign 39 patients correctly; the most successful predictor in the earlier study, Phillips' scale of premorbid adjustment, had assigned 36 patients correctly. Combining these two measures and predicting a poor outcome for only those patients with extreme field-articulation and poor premorbid adjustment 42 of the 51 patients are assigned correctly. The post hoc nature of findings and the necessity for confirmation are stressed.