A form of behaviour therapy that may be used to enhance desired behaviour in mentally challenged clients would be:

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E6 Guide to Mental Health & PSYCHIATRIC NURSING R Sreevani— Part 1 (pp 26-289 of 579) p. 151-153
E6 Kaplan Sadock's Synopsis of Psychiatry-2022 (pp 1-3768 of 3768) p. 2431-2433
Practise the full UP NHM CHO 7 Sept 2022(shift-1st)
Attempt every question from this paper in a timed mock, then review the full solution for each one.