We only have this paper's title and publication details.
Read it at the source(1968). The Psychotic Subnormal. The Journal of Mental Subnormality: Vol. 14, No. 26, pp. 25-34.
No takes yet. Share an insight, caveat, or question.
R A Payne (1968) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: