"An inference about future information in a text is a prediction. We use the text clues and our background knowledge to predict what will happen next in a story or what we will learn later in a text. We then go through the text to confirm, discard, change, or make new predictions, based on new evidence that comes up." (Zwiers, G. ,2010, p. 99)
A predictive inference is more commonly referred to as a prediction. More accurately, a prediction is a type of inference because it is the reader combining what the author explicitly states with his or her prior experience to generate thinking about the text that was not explicitly stated by the author. In the case of a predictive inference, this reader generated extension projects forward into the structure of the text to points that have not yet been read.