A researcher investigated executive functioning in children. A matched pairs design was used. This involved 12 children with attention deficit hyperactivity disorder (ADHD) and 12 children without ADHD. Each child was observed executing a complex puzzle task in a quiet room. The researcher recorded the number of times each child lost focus (defined as looking away from the puzzle for more than 5 seconds). It was found that children with ADHD lost focus significantly more times than children without ADHD.
Identify the independent variable in this study.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.