Longitudinal study
Stanford SHQ (Stenhaug, Ram & Frank 2021)
Stanford University · 2021
Normative Research
This is a population-level study. Its data informs the age windows and confidence scores behind our milestone predictions — telling us when most children reach a given milestone, and how much variation exists.
Sample size
21.9k+
children
Countries
1
USA
Age range
Birth
to 6 years
Milestones covered
422
in our corpus
Coverage by age & domain
Each cell shows how many items this source covers in that age band and developmental category. Darker = more coverage.
| 0–12mo | 12–24mo | 24–36mo | 36–48mo | 48–60mo | 60mo+ | |
|---|---|---|---|---|---|---|
| Body | 1 | 2 | ||||
| Heart | 1 | 1 | 1 | |||
| Curriculum | 160 | 175 | 72 | 69 | 61 |
Domains assessed
Gross motorFine motorLanguageCognitionSocial & emotional
How we used it
422 canonical items linked via supporting_frameworks during P31 B1 normative calibration; the primary voice activity library (1,339 activities) maps to these canonical milestones.
Citation
Stenhaug, B., Ram, N., & Frank, M. (2021). Stanford SHQ Longitudinal Study. Stanford University.
Developmental milestones (422)
Canonical milestones in our developmental ontology that cite this source.
- Cruising Along Furnituremilestone · 8–15mo
- Independent Page Turningmilestone · 15–20mo
- Cooperative Play Skillsmilestone · 45–75mo
- Grasps your finger when placed in {his/her} hand (grasping reflex)milestone · 0–6mo
- Rests legs with {his/her} hips open while lying on {his/her} backmilestone · 0–6mo
- When startled, throws arms in the air, with the palms of {his/her} hands facing up, back and neck stretched; then, quickly retracts arms back to chest (Moro reflex)milestone · 0–6mo
- Stretches and spreads {his/her} toes when the sole of {his/her} foot is stroked (Babinski reflex)milestone · 0–6mo
- Keeps hands clenched in tight fistsmilestone · 0–6mo
- Stays in a flexed position, with arms and knees tucked into {his/her} abdomenmilestone · 0–6mo
- Begins to suck automatically when something touches {his/her} palate (sucking reflex)milestone · 0–6mo
- Opens {his/her} mouth and turns toward your hand when you stroke {his/her} cheek (rooting reflex)milestone · 0–6mo
- Brings hands to {his/her} mouthmilestone · 1–7mo
- Makes guttural sound such as "ga", "gu" or "gr"milestone · 1–7mo
- Expresses like or dislike though facial expressionsmilestone · 1–7mo
- Can turn {his/her} head to either side when lying face upmilestone · 1–7mo
- Holds head up while lying face downmilestone · 1–7mo
- Raises {his/her} legs about 4 in. from the ground while lying face upmilestone · 1–7mo
- Kicks when lying face upmilestone · 1–7mo
- Smiles reflexively (for exampe, while sleeping)milestone · 1–7mo
- Reacts to being touchedmilestone · 1–7mo
- Turns towards a touch on the cheekmilestone · 1–7mo
- Turns towards the direction of a soundmilestone · 1–7mo
- Turns to look at someone who is talking to {him/her}milestone · 1–7mo
- Is startled by loud noisesmilestone · 1–7mo
- Calms down when {he/she} hears familiar voicesmilestone · 1–7mo
- Reacts with joy towards signs of affectionmilestone · 1–7mo
- Smiles at people when {he/she} makes eye contactmilestone · 1–7mo
- Recognizes {his/her} parentsmilestone · 1–7mo
- Pays special attention to facesmilestone · 1–7mo
- Directs {his/her} attention to {his/her} surroundingsmilestone · 2–8mo
- Voluntarily directs {his/her} attention towards a person or situationmilestone · 2–8mo
- Pays attention to an object or person for at least one minutemilestone · 2–8mo
- Shakes arms when something catches {his/her} attentionmilestone · 2–8mo
- Holds {his/her} head steadily, but needs support when carried upright and moved aroundmilestone · 2–8mo
- Can turn {his/her} head left and right when uprightmilestone · 2–8mo
- Pushes down on {his/her} legs when {his/her} feet are placed on a firm surfacemilestone · 2–8mo
- Can fixate {his/her} eyesight on objects 18 inches awaymilestone · 2–8mo
- Looks at the person speaking to {him/her}milestone · 2–8mo
- Follows an object's movement by turning {his/her} headmilestone · 3–9mo
- Brings objects to {his/her} mouthmilestone · 3–9mo
- Makes vowel sounds, such as "eh" or "ah"milestone · 3–9mo
- Lifts {his/her} head and chest using {his/her} elbows and forearms while lying face downmilestone · 3–9mo
- Supports {his/her} head completelymilestone · 3–9mo
- Shakes objectsmilestone · 3–9mo
- Can hold a small object placed in {his/her} hands, like a rattlemilestone · 3–9mo
- Closely observes how you do thingsmilestone · 4–10mo
- Shows an interest in new things {he/she} has not seen beforemilestone · 4–10mo
- Looks around when {he/she} is somewhere unfamiliar to {him/her}milestone · 4–10mo
- Bangs one object with anothermilestone · 4–10mo
- Makes deliberate movements to grab objects that are within reachmilestone · 4–10mo
- Imitates another person's facial expressions (for example, smiling when you smile, frowning when you frown)milestone · 4–10mo
- Makes consonant sounds ("m, n, p, t, d…")milestone · 4–10mo
- Extends {his/her} arms forward while lying face downmilestone · 4–10mo
- Stretches out to reach something while lying face downmilestone · 4–10mo
- Opens hand when you hand {him/her} something, as if expecting contactmilestone · 4–10mo
- Holds {his/her} feet with {his/her} hands when lying face upmilestone · 4–10mo
- Can support {his/her} own weight when held up on his feetmilestone · 4–10mo
- Stretches to reach an object and grabs itmilestone · 4–10mo
- Rolls to face up position while lying face downmilestone · 4–10mo
- Lifts {his/her} head when lying face up, as if attempting to sit upmilestone · 4–10mo
- + 362 more items