While there is no single medical, physical, or genetic test for ADHD an evaluation can be provided by a qualified mental health care professional or physician who gathers information from multiple sources. These can include ADHD symptom checklists, standardized behavior rating scales, a detailed history of past and current functions including the person's history of childhood behavior and school experiences, and information obtained from family members, friends, or significant others. The evaluations also seek to rule out other conditions or differential diagnoses such as depression, anxiety, or substance abuse. Other diseases such as hyperthyroidism may exhibit symptoms similar to those of ADHD, and it is imperative to rule these out as well. Autism is sometimes mistaken for ADHD, due to impairments in executive functioning found in some people with autism. However, autism also typically involves difficulties in social interaction, restricted and repetitive patterns of behavior and interests, and problems with sensory processing, including hypersensitivity. Along with this, the quality of diagnosing an adult with ADHD can often be skewed being that the majority of adults with ADHD also have other complications, ranging from anxiety and depression to substance abuse.