Which statement best describes the population studied in Klinberg et al's WM training research?

• A. Elderly individuals with memory decline
• B. Children diagnosed with ADHD
• C. Typically developing preschoolers
• D. Adults with attention deficits due to fatigue

Answer: (B)

The study’s focus is on a clinical pediatric group—children who have been diagnosed with ADHD. This population is chosen because ADHD is associated with working memory and executive function difficulties, so the researchers could test whether a working memory training program helps those specific challenges. The findings showed improvements on working memory tasks after training for these children, with some evidence of reduced ADHD symptoms compared to a control group. This makes the results most applicable to children with ADHD and not to other groups. The other options describe populations the study did not examine—older adults with memory decline, typically developing preschoolers, or adults with fatigue-related attention issues—so they don’t match the sample used in this research.