Which item is INCORRECT?

When words in a text are primarily regular ones that follow typical phonetic patterns, this is often referred to as decodable text.
 
Word identification strategies are procedures a reader employs when he or she does not recognize a word at sight.
 
In sequential decoding students learn simple one-to-one correspondence between letters and the sounds the letters typically stand for, while in hierarchical decoding more complex understandings are addressed, such as the concept that sometimes letters give clues to the sounds of other letters.
 
Research has shown implicit (sometimes called analytic) phonics instruction to be more productive than explicit (sometimes called synthetic) phonics instruction.