In the Sally-Anne task, a 3-year-old says the marble is in the box (where it actually is now). What does this response reveal about the child's cognitive development?
AThe child is not paying attention to the task correctly
BThe child is reasoning egocentrically but will correct themselves if asked again
CThe child cannot yet represent Sally's belief as distinct from the current state of reality
DThe child has an unusually self-centered personality
The 3-year-old's answer is not an error of attention or personality — it reflects a genuine cognitive limitation. The child cannot form a mental representation of Sally's belief (that the marble is in the basket) as separate from what the child knows to be true (the marble is in the box). Without theory of mind, the child can only report reality as they know it. This is the core insight: ToM isn't about being polite or paying attention — it's about the capacity to model someone else's mental state as distinct from your own.
Question 2 Multiple Choice
A researcher shows that a 4-year-old passes the standard Sally-Anne false-belief task and concludes the child has fully developed theory of mind. What is wrong with this conclusion?
AThe Sally-Anne task is not a reliable measure of ToM at any age
BPassing the basic false-belief task demonstrates only first-order ToM; more complex forms like second-order ToM, irony comprehension, and faux pas detection continue developing into adolescence
CTheory of mind cannot be assessed in children under age 6
DThe child may have passed the task by lucky guessing rather than genuine understanding
Passing the Sally-Anne task at age 4 marks the emergence of first-order ToM ('Sally thinks the marble is in the basket'), but ToM development continues for years. Second-order ToM ('Anne knows that Sally thinks...') emerges around ages 6-8. Understanding irony, faux pas, and subtle social deception requires even more sophisticated embedding of mental states within mental states, and develops through middle childhood and adolescence. The false-belief task is a beginning, not an endpoint.
Question 3 True / False
A 3-year-old who answers 'the box' in the Sally-Anne task actually knows where Sally thinks the marble is but is confused by how the question is phrased.
TTrue
FFalse
Answer: False
This is the most common misinterpretation of false-belief task results. The 3-year-old is not confused by the question — they are answering confidently based on reality as they know it. The cognitive limitation is genuine: they cannot form a representation of Sally's belief as separate from the actual location of the marble. If you rephrase the question in simpler language, 3-year-olds still fail. The shift at age 4-5 is a developmental achievement, not an improvement in comprehension of task instructions.
Question 4 True / False
A child who correctly predicts that Sally will look in the basket (where the marble was before it was moved) has demonstrated the ability to represent another person's belief as distinct from what the child themselves knows to be true.
TTrue
FFalse
Answer: True
This is precisely what first-order theory of mind consists of. The child knows the marble is in the box (reality), but correctly attributes to Sally the belief that it is in the basket (Sally's outdated mental state). The child is holding two conflicting representations simultaneously: reality and someone else's belief about reality. This is the hallmark cognitive achievement that distinguishes children who have acquired ToM from those who haven't.
Question 5 Short Answer
Why is passing the false-belief task considered a developmental milestone rather than simply a piece of factual knowledge the child has acquired? What new cognitive ability does it demonstrate?
Think about your answer, then reveal below.
Model answer: Passing the false-belief task demonstrates that the child can now represent mental states — specifically, beliefs — as distinct from reality. Before this milestone, children can only represent the world as it is; they cannot form a representation of a belief that differs from current reality. The achievement is not learning a new fact but gaining a new type of mental representation: the ability to model another person's mind as a system of beliefs that may be outdated, false, or different from one's own. This is the foundation for understanding deception, pretense, empathy, and all complex social reasoning.
The developmental significance is that ToM is not content (knowing something new) but a representational capacity (being able to think in a new way). Object permanence was a similar milestone: infants didn't learn that objects exist when hidden — they gained the representational capacity to represent hidden objects at all. ToM extends this logic to minds: other people's beliefs are representations that exist and persist even when they don't match reality.