The behavour was the inability to be proactive and engage in the operation- the FO as ballast in the seat. Even when the subject was flying they required direction for the simplest of tasks and when asked to make a decision or show some command they didn't, even when they had been told within a training environment to show some.
I now think that it is not a lack of motivation but somebody who believes that there current level is adequate for the job and is personally happy with what they give and can produce.