摘要：AbstractAttention- Deficit/Hyperactivity Disorder (ADHD) is taken for granted as a neurobiological reality (Hatt, 2009). Some studies define ADHD as a familial disorder (Faraone &Biderman, 1994. Adler, 2008. Nijmeijer, 2011). The aim of this research was to examine the presence of ADHD in parents and siblings of students with/ without ADHD. The research design was descriptive- comparative. The sample group was consisting of 136 students with/ without ADHD (aged range 6-9 years) whom were selected randomly from the elementary schools of Tehran. Students with ADHD were diagnosed by DSM-IV-TR rating scale. Chi Square test was used to analyzing data. Due to available literature, it was expected that the presence of ADHD in parents and/or siblings of students with ADHD be more than students without ADHD, but the findings of this research reveal there's no differences between them. Also, other findings show that academic problems and other behavioral disorders in students with ADHD are more than students without ADHD.
