Evaluate Hughes' 'policeman doll study'.

One major strength of Hughes' study is that the task made more sense to the children than Piaget's three mountains task. The 'hide from the policeman' scenario was a game that children could understand, which means the study likely tested their perspective-taking abilities more directly, rather than their ability to understand an abstract task. This gives the study greater validity than Piaget's. Another strength is that the researcher took steps to ensure the children understood the task. For example, they were given practice trials with just one policeman doll before the main task with two. This careful procedure helps to ensure that the results were a genuine reflection of the children's abilities. However, a potential weakness is that the researcher may have unconsciously given subtle cues to the children about where to hide the doll. This experimenter bias could have influenced the children's choices and inflated the success rate. Also, while the task was more sensible than Piaget's, it was still a laboratory experiment using dolls and models, which may not accurately reflect how children behave in real-life perspective-taking situations, thus lacking some ecological validity.