# The Development of Categorization

> **NCT00001950** · — · COMPLETED · sponsor: **Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)** · enrollment: 219 (actual)

## Conditions studied

- Cognition Disorder
- Healthy

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT00001950
- **Lead sponsor:** Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 1999-12-14
- **Primary completion:** —
- **Final completion:** 2012-05-23
- **Target enrollment:** 219 (ACTUAL)
- **Last updated:** 2018-09-13


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00001950

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00001950, "The Development of Categorization". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT00001950. Licensed CC0.

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