Warning Signs and Behaviors of Autism:
• impaired use of nonverbal behaviors in socialization
  (eye contact, facial expressions, body postures, gestures)
• failure to develop peer relationships appropriate to
  development level
• lack of seeking to share enjoyment, interests, or
  achievements spontaneously with others
• lack of social or emotional expression/ reciprocity
• delay or total lack of verbal language development
  with attempts to compensate
• impairment in ability to initiate or sustain a conversation
  with others (in children who have adequate speech)
• lack of various, spontaneous make-believe play or
  social imitative play appropriate for age/level
• significant preoccupation with one or more stereotyped and
  restricted patterns of interest that is abnormal by
  intensity or focus.
• stereotyped and repetitive motor mannerisms
  (hand or finger flapping or twisting, complex whole
  body movements)
• persistent preoccupation with parts of objects

IV-B.Warning Signs and Behaviors:
    Attention-Deficit/Hyperactivity Disorder, ADHD
Attention-Deficit/Hyperactivity Disorder is significant for the display of a persistent pattern of inattention and/or hyperactivity-impulsivity that is more frequent and severe than is typical for level of development.

Warning Signs and Behaviors of ADHD:
Inattention:
• often fails to give close attention to details, makes
  careless mistakes in schoolwork, work, or other activities
• often has difficulty sustaining attention in tasks or play activities
• often does not seem to listen when spoken directly
• often avoids, dislikes, or is reluctant to engage in tasks
  that require sustained mental effort
  (schoolwork, homework, etc.)
• often easily distracted by external stimuli
• often forgetful in daily activities
Hyperactivity:
• often fidgets with hands or feet or squirms in seat
• often leaves seat in classroom/other situations
  where remaining seated is expected
• often runs about/climbs excessively in inappropriate situations
• often has difficulty playing or engaging in
  leisure activities quietly
• often talks excessively
Impulsivity:
• often blurts out answers before questions
  have been completed
• often has difficulty awaiting turn
• often interrupts or intrudes on others
  (butts into games, conversations, for example)

    I hope this article was informative and a valuable contribution to assist with monitoring the development of children.

Unraveling the Mystery of Autism and Pervasive Developmental Disorder:
a Mother's Story of Research and Recovery, by Seroussi, Karyn $28.20

How to Reach and Teach Add/Adhd Children:
Practical Techniques, Strategies, and Interventions for Helping Children
With Attention Problems and Hyperactivity, by Sandra F. Rief $20.96

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Note: The above lists are not intended for the use of diagnosing disorders. Disorders are diagnosed by the severity, frequency and a combination of many factors. Please seek professional advice should any of the above listed criteria cause any concern.