Baby Talk

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Across
  1. 4. a young child just learning to walk and talk (2)
  2. 6. a grammatical word like “and” or “the” that has little meaning on its own (4)
  3. 7. a theory suggesting learning happens through imitation and reinforcement (2)
  4. 8. a public message that promotes a product, service, or idea (1)
  5. 9. a proposed explanation made on the basis of limited evidence (4)
Down
  1. 1. the level or point at which something starts or changes (6)
  2. 2. children who have been legally taken into another family (7)
  3. 3. experts who study the brain and nervous system (7)
  4. 5. a high level of skill or ability in something (final)
  5. 6. the ability to speak or write a language smoothly and accurately (final)