Title slide reads "Preference Assessment: Single Item Presentation". Video begins with a teacher and a student sitting at a table. Teacher has several candies in three piles in front of her along with a piece of paper. Standing behind the student is a woman who has a large board with a chart on it. On screen text reads "Instructor present items in random order one at a time for ten trials each. If student take an item a plus "+" is recorded, if student does not take the item a minus "-" is recorded." The teacher hands one candy at a time to the child varying the pile she chooses from and the student either eats the candy or pushes it back. Both the teacher and the woman behind the student mark their charts to indicate what the student did. Video fades to black and a title slide reads "Preference Assessment: Paired Item Presentation". Video begins with the same set up as before, but the teacher does not have any candy. On screen text reads "Instructor presents 8 items in pairs and records which of the two items the student selected. Instructor continues this process until all pairs have been presented and records the total number of times each item was selected". The teacher hands the student a pair of items saying "Pick one". The student picks one and begins playing with it. The teacher takes the other item away and marks down the students choice. The woman behind the child does the same. The teacher then takes the item picked and pairs it with another item and tells the student to "pick one". THe same process is repeated several times. Video fades to black and a title slide reads "Preference Assessment: Multiple Item Presentation". Video begins with the same set up as before, two teachers and a child. On screen text reads "Instructor presents student with an array of five to eight items on a tray and records which item the student selected. The process is repeated until the student reliably selects a preferred item". The teacher takes a tray full of toys and presents it to the student. The student picks one of the toys and plays with it. The teachers mark down his choice. The student returns the toy to the teacher when prompted. The teacher adds the toy back to the tray, reorganizes the order of the toys and presents them to the student again. This process is repeated several times. On screen text reads "Instructor removes the preferred item and repeats the presentation until a second item is identified". The teacher now begins removing the toy the student picked and offers him a different set of toys each time. On screen text reads "The process is repeated until three to five items are identified".