Which of the following is NOT a characteristic associated with ADHD?

The characteristic that is not associated with ADHD is high frustration tolerance. Individuals with ADHD often exhibit low frustration tolerance due to their difficulties in regulating emotions and managing impulses. This can manifest as irritability or quick frustration, especially when faced with tasks that require sustained effort or concentration.

In contrast, the other characteristics listed—such as inability to complete tasks, impulsive behavior, and low attention span—are well-documented traits associated with ADHD. People with ADHD frequently struggle to finish projects due to distractibility and disorganization, display impulsive actions without considering the consequences, and typically have a shorter attention span, making it challenging for them to focus on tasks for extended periods of time.