Agony aunt Dr Louise Olivier has slammed the State's mental evaluation of Jacob Zuma's rape accuser as inadequate and potentially inaccurate.

You magazine's "Dr Louise" took the stand this morning to testify in Zuma's defence.

The psychiatrist was called to counter evidence given by trauma psychologist Dr Merle Friedman, who earlier testified that the behaviour of Zuma's accuser was "consistent" with that of a rape victim.

Friedman also diagnosed the complainant as suffering from Post Traumatic Stress Disorder as a result of the alleged rape.

Olivier's critique of the way in which the complainant had been evaluated by Friedman included the following points:

During the two-and-a-half hours she had spent evaluating the complainant, Friedman failed to take the woman's full clinical history. Olivier said such a detailed history was essential for an accurate evaluation of the complainant's behaviour before and after the alleged rape.

Friedman had not adequately explored the previous allegations of rape made by the complainant. Friedman had testified that the complainant told her about incidents of sexual abuse she had suffered as a child, but not about other claims which had since emerged.

Olivier criticised Friedman for not assessing the complainant's claims that she had "frozen" during the alleged rape with the appropriate tests.

Olivier said Friedman could also have tested the complainant's claims that she struggled to concentrate after the alleged rape with an adult intelligence test.

Questioned by Zuma's counsel Kemp J Kemp SC about the complainant's claims that she had been in a "daze" after the alleged rape, but had sent SMSes, showered, taken water and strawberries from the kitchen and made a call to Swaziland, Olivier said she would have expected the complainant to have made some "functional" mistakes.

Olivier also said the complainant's claims that she had frozen during the alleged rape were incompatible with her sexual history.

She said the complainant had testified that at the age of 13 she had been woken in the night by a man she called Malume who tried to rape her. She had told him to stop and wriggled away.

Then at the age of 19, she claimed to have fought off the unwelcome advances of a fellow student.

"Now at the age of 30, when she has had a lot more life experience, she is more mature and a counsellor herself, she freezes. This is not compatible," Olivier said.

Olivier described the psychological phenomenon of transference, in which the memory of one incident is translated to another.

This could happen, for example, when a person had consensual sex and then experienced a change in their memory of what they believed actually happened.

The case continues.

With acknowledgement to Karyn Maughan & Gill Gifford and Cape Argus.