Bayley 4
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Bayley 4 Field Research Opportunity

To speak with a Field Research Coordinator call 1-800-233-5686 Monday through Friday from 8:00 a.m.-5:00 p.m., or email us.

What is the Bayley 4?

The Bayley Scales of Infant and Toddler Development is a multi-scale battery that tests five developmental domains: social-emotional behavior, adaptive behavior, cognitive, motor, and language. It is the premier assessment for measuring developmental delays in very young children. Various phases of data collection for the 4th edition of the Bayley will continue through 2018.

The following professionals are invited to participate in data collection:

  • School Psychologists
  • Clinical Psychologists
  • Developmental Psychologists
  • Neuropsychologists
  • Psychometrists
  • Educational Diagnosticians
  • Early Childhood Intervention Specialists
  • Occupational Therapists
  • Physical Therapists
  • Speech-Language Pathologists
  • Pediatric Nurse Practitioners

Data Collection: January 2017 through Late 2018

Administration Time: 30–90 minutes

Test Type: Paper and digital components

Training included: Yes

For specific information about current sample needs or project pay, please contact the Field Research Team at or 1-800-233-5686.