The Pediatric Symptom Checklist (PSC-35) is a 35-item parent/caregiver-report screen for psychosocial dysfunction in children and adolescents aged 4-17. It casts a deliberately wide net across cognitive, emotional and behavioural functioning rather than measuring a single disorder: items span attention and hyperactivity, mood, anxiety, school functioning, peer relationships and conduct.
Each item asks how often a behaviour is present (never/sometimes/often). The output is a single dimensional score reflecting overall psychosocial impairment, with optional attention, internalising and externalising subscales. It is a first-stage screen: a positive result flags the need for fuller assessment, not a diagnosis.
02 - Origin & purpose
Where it comes from.
Developed by Michael Jellinek and J. Michael Murphy at Massachusetts General Hospital and validated in 1988 (Journal of Pediatrics), the PSC was built for a specific gap: paediatricians in outpatient practice were missing a large share of psychosocial problems in routine visits, and no brief, free parent-report screen existed that a practice could score in under five minutes.
It became one of the most widely used paediatric mental-health screens internationally, spawning the PSC-17 short form, the youth self-report (Y-PSC), preschool and pictorial versions, and translations into dozens of languages. In the US it is embedded in Bright Futures and many Medicaid EPSDT programmes as a routine well-child screening tool.
03 - Scoring & cutoffs
How scoring works.
Items score never = 0, sometimes = 1, often = 2; total range 0-70. The cutoff is 28 or above for ages 6-16 (Jellinek et al. 1988), and 24 or above for ages 4-5, where school-related items are often left blank (Little et al. 1994; Pagano et al. 1996). Blank items score 0; if four or more items are blank the questionnaire is invalid.
Subscale scoring (from the PSC-17 factor work, applicable to the same items here): attention subscale - items 4, 7, 8, 9, 14, at-risk at 7 or above; internalising subscale - items 11, 13, 19, 22, 27, at-risk at 5 or above; externalising subscale - items 16, 29, 31, 32, 33, 34, 35, at-risk at 7 or above. A positive screen indicates the need for further evaluation by a qualified clinician, never a diagnosis.
Score
Severity
Interpretation
0–23
Below cutoff
Screen negative at both age cutoffs (ages 4-5 and 6-16). No further action indicated on this screen alone.
24–27
Positive screen (ages 4-5)
Above the cutoff of 24 for children aged 4-5: psychosocial impairment is likely and further evaluation is recommended. For children aged 6-16 this range is still below the cutoff of 28.
28–70
Positive screen
Above the cutoff of 28 for ages 6-16 (and well above the cutoff of 24 for ages 4-5): psychosocial impairment is likely and further evaluation is recommended.
If four or more items are left blank, the questionnaire is considered invalid. A positive screen indicates the need for further evaluation, not a diagnosis.
04 - Validation evidence
How well it performs.
The original criterion validation compared PSC screening with in-depth clinician interview and paediatrician ratings (Jellinek 1988); a national feasibility study of 21,065 children across primary-care sites followed (Jellinek 1999). Internal consistency and retest stability are consistently strong across studies (Murphy et al.).
-Suicide-risk screening - it contains no suicide item; use a dedicated screen such as the ASQ.
07 - Confidence & precision
Reading the score with care.
There is no published SEM or MCID for the PSC-35 - it was built and validated as a classifier, not an outcome measure. Programme data suggest roughly two of three positive screens are confirmed as moderate-to-serious impairment on fuller assessment, and negative screens are about 95% accurate, so its strength is ruling out. Score movement across administrations should be read cautiously; for measuring change, use a domain-specific instrument.
08 - Limitations
What it cannot tell you.
Specificity of 0.68 means a meaningful false-positive rate - budget clinical time for positives that do not confirm. The original criterion validation rested on a modest interview subsample (n = 48). Cutoffs were derived in US samples and performance varies by population and setting - several studies suggest different optimal cutoffs in low-income and non-English-speaking samples.
It is a parent's perception - informant bias runs both ways, and parent-youth agreement is only moderate. Some item wording shows its 1980s origin ("has trouble with teacher"). It contains no suicide or self-harm content.
[3]Little M, Murphy JM, Jellinek MS, et al. Screening 4- and 5-year-old children for psychosocial dysfunction: a preliminary study with the Pediatric Symptom Checklist. J Dev Behav Pediatr. 1994;15:191-197. (1994) ↩
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