SNAP-IV 26-Item Teacher and Parent Rating Scale

The Swanson, Nolan, and Pelham-IV Rating Scale (SNAP-IV-26) is a widely used, standardized measure designed to evaluate the presence and severity of…

SNAP-IV 26-Item Teacher and Parent Rating Scale
Questions
26
Duration
10 min
Original title
SNAP-IV-26 — Swanson, Nolan, and Pelham-IV Rating Scale
Adaptation
SNAP-IV 26-Item Teacher and Parent Rating Scale
Authors
Swanson, J.M., Nolan, W., & Pelham, W.E.
Created
1992

The Swanson, Nolan, and Pelham-IV Rating Scale (SNAP-IV-26) is a widely used, standardized measure designed to evaluate the presence and severity of symptoms associated with Attention-Deficit/Hyperactivity Disorder (ADHD) and Oppositional Defiant Disorder (ODD) in children and adolescents. Completed by a parent, caregiver, or teacher, it offers clinicians a structured, multi-informant window into the young person's daily functioning across different environments. By mapping directly onto core diagnostic criteria, the SNAP-IV provides an essential framework for quantifying behavioral regulation and attention difficulties, much like how ADHD management tips help structure therapeutic interventions.

In clinical practice, the 26-item version is highly valued for its efficiency and focused clinical utility. It is not a standalone diagnostic test, but a robust clinical tool that establishes a baseline and tracks changes over the course of treatment. Gathering data from both home and school environments allows clinicians to observe situational variations in symptoms, supporting a more nuanced, ecologically valid assessment of the child's behavioral profile before introducing ADHD parenting strategies.

Example result

Fictitious result, computed from a sample set of answers.

A 26-item rating scale used to screen for ADHD and oppositional defiant disorder (ODD) in children, and to evaluate symptom severity according to DSM-IV criteria. The symptom domains assessed are Inattention (IA, items 1-9), Hyperactivity/Impulsivity (HI, items 10-18), and Opposition/Defiance (OD, items 19-26). Informant-report assessment completed by a parent or teacher for a child/adolescent aged 6 to 18 years.
Hyperactivity/Impulsivity
13/ 27
The Hyperactivity/Impulsivity subscale (items 10-18) corresponds to the 9 ADHD hyperactivity and impulsivity symptoms as defined in the DSM-IV.
items 10, 11, 12, 13, 14, 15, 16, 17, 18
0–12
Symptoms not clinically significant
13–17
Mild symptoms
13
18–22
Moderate symptoms
23–27
Severe symptoms
Scoring guidelines recommended by the Canadian ADHD Resource Alliance (CADDRA) and Canadian Collaborative Mental Health Care Initiative to classify severity.
généralemixed · general population · Parent-rated · 5–11 years · United States · n = 855 · 1998 · Bussing et al. (2008)
027
13
M = 2.9 ± 2.9
cliniquemixed · pathology : general behavioral/emotional concern · Parent-rated · 5–11 years · United States · n = 439 · 1998 · Bussing et al. (2008)
027
13
M = 6.8 ± 5.6
cliniquemixed · pathology : suspected or diagnosed adhd · Parent-rated · 5–11 years · United States · n = 318 · 1998 · Bussing et al. (2008)
027
13
M = 13.1 ± 7.8
cliniquemixed · pathology : adhd diagnosis positive · Parent-rated · 5–11 years · United States · n = 111 · 1998 · Bussing et al. (2008)
027
13
M = 16.5 ± 7.2
For information
Cut-off≥ 11ADHD screening cutoff (hyperactivity-impulsivity)
Hyperactivity-Impulsivity: "≥11" cutoff with "0.700" sensitivity and "0.728" specificity (Table 4, raw sum, parents).
Costa et al. (2019)View the study
Inattention
12/ 27
The Inattention subscale (items 1-9) corresponds to the 9 ADHD inattention symptoms as defined in the DSM-IV.
items 1, 2, 3, 4, 5, 6, 7, 8, 9
0–12
Symptoms not clinically significant
12
13–17
Mild symptoms
18–22
Moderate symptoms
23–27
Severe symptoms
Scoring guidelines recommended by the Canadian ADHD Resource Alliance (CADDRA) and Canadian Collaborative Mental Health Care Initiative to classify severity.
généralemixed · general population · Parent-rated · 5–11 years · United States · n = 855 · 1998 · Bussing et al. (2008)
027
12
M = 2.2 ± 2.7
cliniquemixed · pathology : general behavioral/emotional concern · Parent-rated · 5–11 years · United States · n = 439 · 1998 · Bussing et al. (2008)
027
12
M = 6.7 ± 5.8
cliniquemixed · pathology : suspected or diagnosed adhd · Parent-rated · 5–11 years · United States · n = 318 · 1998 · Bussing et al. (2008)
027
12
M = 14.1 ± 7.9
cliniquemixed · pathology : adhd diagnosis positive · Parent-rated · 5–11 years · United States · n = 137 · 1998 · Bussing et al. (2008)
027
12
M = 16.6 ± 6.9
For information
Cut-off≥ 16ADHD screening cutoff (inattention)
Inattention: "≥16" cutoff with "0.792" sensitivity and "0.811" specificity (Table 4, raw sum, parents).
Costa et al. (2019)View the study
Opposition (ODD)
12/ 24
The Oppositional subscale (items 19-26) corresponds to the 8 Oppositional Defiant Disorder (ODD) symptoms as defined in the DSM-IV.
items 19, 20, 21, 22, 23, 24, 25, 26
0–6
Below cutoff
7–24
Probable ODD
12
Score ≥ 7: positive screen for oppositional defiant disorder (Costa et al., 2019 — Se 70.8 %, Sp 65.7 %). Warrants clinical evaluation.

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What the test measures

The SNAP-IV-26 measures three primary behavioral dimensions aligned with core diagnostic criteria for ADHD and Oppositional Defiant Disorder (ODD). It systematically captures the frequency of specific difficulties as observed by key adults in the child's life, helping tailor coping strategies for children and adolescents.

  • Inattention: Difficulties sustaining focus, organizing tasks, following instructions, and managing daily routines without losing things or becoming distracted.
  • Hyperactivity and Impulsivity: Physical restlessness, difficulty remaining seated or playing quietly, excessive talking, and struggles with waiting or interrupting others.
  • Opposition and Defiance: Tendencies toward anger, arguing with adults, actively refusing rules, deliberately annoying others, and vindictive behaviors.

This instrument is intended for children and adolescents, typically between the ages of 6 and 18, and relies on the observational report of parents, caregivers, or teachers.

When and why to use it

Clinicians integrate the SNAP-IV-26 at various stages of the clinical journey to support comprehensive evaluation and evidence-based care.

  • Intake and baseline assessment: To establish a structured, quantitative profile of ADHD and ODD symptoms before initiating targeted interventions or building new habits.
  • Cross-context screening: To compare behavioral reports between parents and teachers, highlighting whether symptoms are pervasive across settings or context-dependent.
  • Monitoring treatment response: To track shifts in symptom severity over time, offering objective data to evaluate the efficacy of pharmacological therapies or behavioral interventions like study tips for ADHD and test anxiety.
  • Differential support: To distinguish between pure attentional struggles and co-occurring oppositional behaviors, guiding more tailored family and school accommodations.

Using a validated measure like the SNAP-IV-26 anchors clinical impressions with standardized data, ensuring that subtle behavioral changes are reliably captured rather than relying solely on subjective observation.

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The questions

  1. For each item, choose the column that best describes the child: "Not at all", "A little", "Often", or "Very often".
    1. Often fails to give close attention to details or makes careless mistakes in schoolwork
    Probes the frequency of careless mistakes and difficulty managing fine details in structured tasks.
    • Not at all
    • Just a little
    • Often
    • Very often
  2. 2. Often has difficulty sustaining attention in tasks or play activities
    Assesses the child's capacity to maintain focus during both required duties and leisure activities.
    • Not at all
    • Just a little
    • Often
    • Very often
  3. 3. Often does not seem to listen when spoken to directly
    Evaluates apparent auditory attention and responsiveness in direct one-on-one interactions.
    • Not at all
    • Just a little
    • Often
    • Very often
  4. 4. Often does not follow through on instructions and fails to finish schoolwork
    Explores the ability to follow multi-step instructions through to task completion.
    • Not at all
    • Just a little
    • Often
    • Very often
  5. 5. Often has difficulty organizing tasks and activities
    Examines executive functioning skills related to planning and structuring activities.
    • Not at all
    • Just a little
    • Often
    • Very often
  6. 6. Often avoids, dislikes, or is reluctant to engage in tasks that require sustained mental effort
    Highlights avoidance behaviors triggered by tasks demanding prolonged cognitive effort.
    • Not at all
    • Just a little
    • Often
    • Very often
  7. 7. Often loses things necessary for tasks or activities (e.g., school assignments, pens, or books)
    Checks for frequent misplacement of essential everyday materials and tools.
    • Not at all
    • Just a little
    • Often
    • Very often
  8. 8. Is often easily distracted by external stimuli
    Captures the degree of vulnerability to outside interruptions and sensory distractions.
    • Not at all
    • Just a little
    • Often
    • Very often
  9. 9. Is often forgetful in daily activities
    Probes the frequency of memory lapses concerning routine daily tasks.
    • Not at all
    • Just a little
    • Often
    • Very often
  10. 10. Often fidgets with hands or feet
    Assesses the presence of subtle, localized physical restlessness.
    • Not at all
    • Just a little
    • Often
    • Very often
  11. 11. Often leaves seat in classroom when supposed to remain seated
    Evaluates the child's ability to adhere to situational expectations requiring them to remain seated.
    • Not at all
    • Just a little
    • Often
    • Very often
  12. 12. Often runs about or climbs excessively in situations where it is inappropriate
    Explores inappropriate or excessive gross motor activity across different environments.
    • Not at all
    • Just a little
    • Often
    • Very often
  13. 13. Often has difficulty playing or engaging in leisure activities quietly
    Highlights difficulties in modulating energy levels during quiet play.
    • Not at all
    • Just a little
    • Often
    • Very often
  14. 14. Is often 'on the go' or acts as if 'driven by a motor'
    Captures the subjective presentation of being relentlessly driven by internal energy.
    • Not at all
    • Just a little
    • Often
    • Very often
  15. 15. Often talks excessively
    Probes the volume and continuity of verbal output.
    • Not at all
    • Just a little
    • Often
    • Very often
  16. 16. Often blurts out answers before questions have been completed
    Evaluates verbal impulsivity and the capacity to inhibit immediate responses.
    • Not at all
    • Just a little
    • Often
    • Very often
  17. 17. Often has difficulty awaiting turn
    Assesses the child's tolerance for delay in structured or social situations.
    • Not at all
    • Just a little
    • Often
    • Very often
  18. 18. Often interrupts or intrudes on others (e.g., butts into conversations or games)
    Examines intrusive social behaviors that disrupt others' activities or conversations.
    • Not at all
    • Just a little
    • Often
    • Very often
  19. 19. Often loses temper
    Evaluates emotional dysregulation and the frequency of angry outbursts.
    • Not at all
    • Just a little
    • Often
    • Very often
  20. 20. Often argues with adults
    Captures a pattern of challenging or debating adult authority.
    • Not at all
    • Just a little
    • Often
    • Very often
  21. 21. Often actively defies or refuses to comply with adults' requests or rules
    Highlights active non-compliance and direct refusal to follow established rules.
    • Not at all
    • Just a little
    • Often
    • Very often
  22. 22. Often deliberately annoys others
    Explores intentional behaviors aimed at provoking or irritating peers and family members.
    • Not at all
    • Just a little
    • Often
    • Very often
  23. 23. Often blames others for their mistakes or misbehavior
    Assesses the tendency to externalize blame and avoid taking responsibility for actions.
    • Not at all
    • Just a little
    • Often
    • Very often
  24. 24. Is often touchy or easily annoyed by others
    Probes emotional hypersensitivity and reactivity to minor interpersonal frictions.
    • Not at all
    • Just a little
    • Often
    • Very often
  25. 25. Is often angry and resentful
    Captures an underlying baseline of sustained anger or lingering resentment.
    • Not at all
    • Just a little
    • Often
    • Very often
  26. 26. Is often spiteful or vindictive (wants to get revenge)
    Evaluates the presence of retaliatory or deliberately malicious behaviors.
    • Not at all
    • Just a little
    • Often
    • Very often
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