SNAP-IV 26 - Teacher & Parent Rating Scale

Assess children for attention deficit hyperactivity disorder (ADHD)


2.Rater Type?
3.Often fails to give close attention to details or makes careless mistakes in schoolwork or tasks
4.Often has difficulty sustaining attention in tasks or play activities
5.Often does not seem to listen when spoken to directly
6.Often does not follow through on instructions and fails to finish schoolwork, chores, or duties
7.Often has difficulty organizing tasks and activities
8.Often avoids, dislikes, or reluctantly engages in tasks requiring sustained mental effort
9.Often loses things necessary for activities (e.g., toys, school assignments, pencils, or books)
10.Often is distracted by extraneous stimuli
11.Often is forgetful in daily activities
12.Often has difficulty maintaining alertness, orienting to requests, or executing directions
13.Often fidgets with hands or feet or squirms in seat
14.Often leaves seat in classroom or in other situations in which remaining seated is expected
15.Often runs about or climbs excessively in situations in which it is inappropriate
16.Often has difficulty playing or engaging in leisure activities quietly
17.Often is "on the go" or often acts as if "driven by a motor"
18.Often talks excessively
19.Often blurts out answers before questions have been completed
20.Often has difficulty awaiting turn
21.Often loses temper
22.Often argues with adults
23.Often actively defies or refuses adult requests or rules
24.Often deliberately does things that annoy other people
25.Often blames others for his or her mistakes or misbehavior
26.Often touchy or easily annoyed by others
27.Often is angry and resentful
28.Often is spiteful or vindictive


The SNAP-IV is a widely-used rating scale used to screen for Attention Deficit Hyperactivity Disorder. In its original form, the SNAP-IV had 90 items that evaluated hyperactivity-impulsiveness and inattention, as well as a variety of other psychiatric symptoms. The 26 item SNAP-IV-26 was modified from the original SNAP-IV for the Multimodal Treatment Study of Children with ADHD (MTA) study of 1999.

The SNAP-IV-26 screens for nine symptoms of ADHD hyperactive-impulsive type, nine symptoms of ADHD inattentive type, and eight symptoms of oppositional defiant disorder as defined in the DSM-IV. Risk scores are produced by summing and then calculating the average score for each of the symptom clusters, as well as a combined score for the hyperactive-impulsive and inattentive clusters.

The SNAP-IV-26 can be as much as 90 to 97 percent sensitive and specific when using the appropriate cut-off scores. The cut-offs used here represent the top 5% of scores when the scale was administered to a large group of children in the USA. This is consistent with the DSM-5 which reports a prevalence of ADHD of approximately 5%. Cut-off scores are higher when using teacher and clinician ratings as compared to parent ratings. Parents have been found to be better predictors of a diagnosis of ADHD.

Positive screens using these relatively conservative cut-offs should lead to further evaluation of ADHD symptoms including interviews with parents, teachers, other professionals or care providers. Patients with particularly debilitating symptoms may even benefit from empirical treatment. Negative screens suggest that other causes for the symptoms should be explored.


Canadian Attention Deficit Hyperactivity Disorder Resource Alliance (CADDRA): Canadian ADHD Practice Guidelines, Third Edition, Toronto ON; CADDRA, 2011.

Swanson JM.

School-Based Assessments and Intervention for ADD Students. Irvine: KC Publishing, 1992.

The SNAP-IV 26 - Teacher & Parent Rating Scale calculator is created by QxMD.

Created by on 01/08/2015

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1. Age?

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