An impoverishment in thinking that is inferred from observing speech and language behavior.
There may be brief and concrete replies to questions and restriction in the amount of spontaneous speech (termed poverty of speech). Sometimes the speech is
adequate in amount but conveys little information because it is over concrete, over abstract, repetitive, or stereotyped (termed poverty of content).
Adapted from American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. Fifth Edition. Washington, DC. American Psychiatric Association. 2013. Page 817.