Question 1
Marianne conducted research into the stages of language development in children aged between 2 and 5 years old. She selected 7 participants from each of the following age groups: 2-year-olds, 3-year-olds, 4-year-olds and 5-year-olds.
Marianne visited each participant once and gathered data about the number of words the children spoke in sentences, and the level of grammatical accuracy in their sentence structure.
She compared her data across each age group to determine how language develops in children aged between 2 and 5 years old.
Marianne used an opportunity sample of children from a single village.
Justify how Marianne could improve the generalisability of her study.