In DTT (and all other kinds of learning), it is extremely important that most trials be reinforced. For more information about how to implement reinforcement with learners with ASD, please refer to the Evidence-Based Practice Brief: Reinforcement (National Professional Development Center on ASD, 2009). Failed trials lead to behavior problems. Thus, in the face of learner failures, the adult moves quickly to simplify the task so that the learner can be reinforced. For example, if a learner was having a hard time labeling new or novel pictures the teacher/practitioner could ask the learner to label known pictures which are easy for the learner to identify. When the learner identifies the known pictures correctly, the teacher/practitioner can reinforce the correct answers.