increasing difficulty levels. Rather, this finding is reminiscent of the adequate performance of schizophrenic patients during difficult non-verbal working memory tests in contrast to their subpar performance on easier verbal memory tests (Wexler et al., 1998), and adds to the growing evidence that at least a subgroup of patients with schizophrenia has a selective deficit in verbal memory (e.g., Stevens et al., 2000; Wexler et al., 2002; Bruder et al., 2004).
