Parents should avoid toilet training until the child is at least a year old. This view is most consistent with the Psychoanalytic Theory.
Step-by-step explanation:
The theory of Psychoanalysis was established by Sigmund Freud who believed that people can be cured mentally and emotionally if they are encouraged and motivated. To the utmost surprise the toilet training of children is also affiliated with the psychoanalytic theory.
Parents should start the toilet training of their children until they are a year old so that they may develop control over their bodily needs. If they start the training too early, children may develop an retentive personality which may result as a stringent, orderly, rigid and obsessive.
On the other hand, if they behave in a lenient way, the personality outcome may be destructive and messy. Hence, the toilet training should be started at least when the child is mentally ready to adapt it independently.