Explanation:

- R.D. Laing: A Scottish psychiatrist known for his unconventional views on mental illness, particularly schizophrenia. He explored the social environment's impact on mental health, particularly within families.

- David Cooper: A South African psychiatrist associated with the anti-psychiatry movement alongside Laing. He focused on challenging traditional psychiatry.

- D Leach: Not prominently known for work related to schizophrenia or family dynamics in psychiatric literature.

- P. Kolenda: There is limited association with psychiatry or the study of schizophrenic children, as this name is not widely recognized in this context.

R.D. Laing is the correct answer.