Final answer:
Discrete Trial Training has faced criticism for creating inflexible learners and for lack of generalization of skills, suggesting that while it can teach specific behaviours, it may not prepare learners for real-world variability.
Step-by-step explanation:
Discrete Trial Training (DTT) has been criticized for creating inflexible learners and for the lack of generalization of skills to other contexts. These limitations reflect concerns that DTT may produce specific skill acquisition that does not translate well into real-world settings, where the ability to adapt and apply skills flexibly is vital. The criticisms suggest that while DTT can be effective for teaching certain behaviours or tasks, it might not sufficiently account for the natural variability of environmental demands, or the nuances required for complex social interactions.