Rationale describes the underlying basis for the study, and Specific Aims list exactly what you propose to do.

What is difference between aim and objective?

Aim = what you hope to achieve. Objective = the action(s) you will take in order to achieve the aim. Aims are statements of intent. ... Objectives, on the other hand, should be specific statements that define measurable outcomes, e.g. what steps will be taken to achieve the desired outcome.

Is Purpose Statement same as AIM?

Both words mean an object intended to be attained, or simply an intention. ... In other words, a purpose answers the question 'why', while an aim answers the question 'what'. For instance, in the statement 'this is the purpose of installing 5 new laser printers' translates to the reason why they're installing the printers.