Mind Map 4- this mind map primarily outlines Tulving's research into the 3 types of LTM: episodic, semantic and procedural. It also includes evaluation points. In this case, one of the main problems with these 3 types of LTM is that there may only be 2: declarative and non-declarative. In your essay responses, if you get a question on a topic such as this one where there are very few limitations, don't panic. You're not expected to provide equal weighting to both strengths and weaknesses!