Ritically contrast the behaviourist approach to psychology with the cognitive approach. You should refer to primary sources wherever possible.

The emphasis is on contrast a if the essay consists only of a description of the behavourist approach and one other it would fail.

Spend as little time as possible on outlining each approach a you could go straight into contrasting.
You can contrast using the features on which each theory was evaluated:

Is it scientific?
Mind body position
Reductionist?
Idealist or materialist?
Freewill vs determinism?

Again if the two approaches are similar thatas OK but say why, expand on each point.

be sure to distinguish between information processors and the more general approaches of Bartlett, Piaget, Bruner, Kohler etc.