How can childhood amnesia be explained?

How can childhood amnesia be explained?

1. Tulving (1983) claimed that lack of episodic memories of infancy and early childhood

2. Newcombe et al. (2007) found implicit and semantic memory function at the age of two as well as the maturation of hippocampus

3. Scarf et al. (2013) found episodic memory does not develop until the age of 4

4. Ceci and Bruck (1993) found that younger children participants could easier mislead information in later reports

5. Moscovitch and Melo (1997) found that patients confabulate about autobiographical memories and non-personal historical events