Pettito & Marentette 1991 – Babbling in the manual mode: Evidence for the ontogeny of language

March 4, 2024March 4, 2024 Discipline: Psychology

Assignment #6

Pettito & Marentette (1991) Babbling in the manual mode: Evidence for the ontogeny of language


The goal of this assignment is to discuss, in depth, a classic study on children’s language development. You should read the corresponding Pettito & Marentette article and answer the following questions about the study. *Each answer must be put in your own words! If you struggle with doing this, try to rephrase to explain to a roommate or friend (in plain language). Please be as in depth as possible in your responses. 


  1. Answer the following about the methods used.

    1. What type of study was conducted? 1pt

    2. Who participated? What were the control and experimental groups? 3pts

    3. What was their hypothesis (in your own words)? 2pts

    4. What is the dependent variable? 1pt

    5. What is the independent variable? 1pt

    6. What did they find/what were the results? 3pt

  2. What were 2 consistent patterns, properties, or behaviors observed with both deaf and hearing infants? Be sure to explain it in your own words! 4 pts





  1. Do you think her results more consistent with domain-general or domain-specific accounts of language? Why? Note, there is no right or wrong answer; both are acceptable depending on your explanation of WHY. 2 pts




  1. What developmental psychology theory (that we’ve discussed so far in class – think back to the first few weeks and/or the cognitive theories) best fits with this data? Why? 3 pts


I have provided a PDF with all the required reading for this assignment. Please be as in depth as possible in your responses to the questions.  

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