The Three Dimensions of Conscience
1. Awareness (of the existence of a moral choice)
2. Examination (of one's conscience and of the available options)
3. Judgment - Action (making the most moral choice and acting upon it)
Erroneous Conscience - when you use your conscience but it is not properly formed and thus leads you to an immoral decision (or to a moral decision for the wrong reason)
Lax Conscience - your conscience is properly formed, but is underused. That is, you omit the first two dimensions of conscience and jump to number 3.
Informed Conscience - what your book calls a properly formed conscience, which is one that is educated and developed by constant use and examination.