At What Age Do Babies Learn to Crawl? Does It

question 17

Multiple Choice

At what age do babies learn to crawl? Does it take longer to learn in the winter when babies are often bundled in clothes that restrict their movement? Data were collected from parents who brought their babies into the University of Denver Infant Study Center to participate in one of a number of experiments between 1988 and 1991.Parents reported the birth month and the age at which their child was first able to creep or crawl a distance of 4 feet within 1 minute.The resulting data were grouped by month of birth: January,May,and September. The data are to be analyzed with the Kruskal-Wallis test.Under the null hypothesis,what is the approximate distribution of H?

• A)F(2,6)
• B)N(  ,  )
• C)  (2)
• D)  (3)

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Definitions:

Semicircular Canals

Structures within the inner ear that are key components of the vestibular system, helping to maintain balance by responding to rotational movements.

Sensory Restriction

Sensory restriction involves limiting one or more of the senses, such as sight or hearing, for therapeutic purposes, experimental research, or personal exploration of sensorial experience.

Visual Development

The process of improving and maturing the visual system, affecting how visual information is processed.

Critical Period

A specific time in development during which the presence or absence of certain experiences has a profound influence on the formation of abilities.