Bayley Scale for Infant Development

Motor Scale ;

INTERPRETATION

To diagnosing developmental delay scores must be like below:

Item Administration

Start point

1) The deggree of body control

2) Large muscle coordination

3) Finer manipulatory skills of the hands and fingers

4) Dynamic movement

5) Postural imitation

6) The ability to recognize objects by sense of touch ( stereognosis)

Timing Of The Test

Cognitive ( Mental ) Scale

*25% delay in functioning when compared to his or her same age peers

* SD below the mean of

a reference group

* Performing a certain number or SD below of months below chronological age

*Stopwatch

*Score only what the child completed

within the time limit.

* Allowing the child to complete a task

if is nearly finish.

*30-90 min

Application Of The Bayley Test

First the researcher have to know the demographic information about the child.

Calculate the child’s chronological age.

(The Birth date)

These domains are ;

Sensory/perceptual acuities, discriminations and response

Acquisition of object constancy

Memory learning and problem solving

Vocalization and beginning of verbal communication

Basis of abstract thinking

Habituation

Mental mapping

Complex language and mathematics concept formation

Average Reliability

SCORING

History of The Test

Continue to apply the reversal rule until the baby or the child can pass

the first three task of the age.

Motor .92

Cognitive .91

Behaviour .93

*Raw scores of successfully completed items are added to subtest scaled scores and

to comparing to the standard scores.

1969:Nancy Bayley published Bayley Scales of Infant Development

1993: Bayley, The Bayley Scales of Infant Development, Second Edition

2006: The Bayley Scales of Infant and Toddler Development, 3rd Edition

*Bayley-III maintain previous version’s quality

*Aim of the revision: changing the test according to applicability in clinical setting , updating normative data

*improve overall quality.

*Measure cognitive,motor development and behaviour of infant.

In the 1993, published revision of the orginal Bayley Scale.

Aim of the revision: extend and improving quality and content.

Extend age range of BSID

Original version maintain, only new item added.

References

Norms were accepted.

Did not include disabled, premature and other at-risk children.

History of The Test (Cont)

Gagnon, S. G., & Nagle, R. J. (2000). Comparison of the revised and original versions of the Bayley Scales of Infant Development. School Psychology International, 21(3): 293-305 (Aug 2000).

Niccols, A., & Latchman, A. (2002). Stability of the Bayley mental scale of infant development with high risk infants. British Journal of Developmental Disabilities, 48(1; ISSU 94), 3-13.

Lennon, E. M., Gardner, J. M., Karmel, B. Z., & Flory, M. J. (2008). Bayley scales of infant development. Encyclopedia of infant and early childhood development, 145-156.

http://www.healthofchildren.com/B/Bayley-Scales-of-Infant-Development.html

https://commondataelements.ninds.nih.gov/Doc/NOC/ Bayley_Scales_of_Infant_Development_NOC_Link.pdf

http://images.pearsonclinical.com/images/PDF/Bayley-III_Webinar.pdf

www.psychometrics.cam.ac.uk

www.kimpsikoloji.com

www.healthofchildren.com

The Three categories

Reversal Rule

1969:Nancy Bayley published Bayley Scales of Infant Development

Asses the development of infant from 2-30 months of age.

45-60 minutes

Cognitive

Motor

Behavioral

Aim of The Test

Bayley Scales, combined their content and quality from different scales and source so that Bayley considered eclectic.

* The scores are determining the child's

performance compared with control group of typically developing children of the same month age.

*If the child or baby have problem with the tasks after locating the start point, the researcher should use the "Reversal Rule".

*Go back to the start point for the

previous age.

The test measures 3 domain in child: cognitive, motor and behavioral

History of The Test

Bayley-III maintain previous version’s quality

Aim of the revision: changing the test according to applicability in clinical setting , updating normative data

improve overall quality.

Measure cognitive,motor development and behaviour of infant.

To learn individual differences, development, intellectual capacity. (Debate in 20. century)

Binet - intelligent test

Gessel – age change in infant

Bayley have different view from Binet,Gessel but be influenced their scales.

The BSID have high reliability and validity

Locating The Start Point

There is a high correlation coefficients ( .83 and .77 ) between mental and motor scales for test-retest reliability.

“ The BSID was standardized on 1,700 infants, toddlers , and preschoolers between one and 42 months of age”. (www.healthofchildren.com)

Locate the child's age in the form of months and days then find the letter which is next by it.

Behaviour Rating Scale ;

Children age range between 1 to 42 months

Conversation and application proces

Understand motor and intellectual development.

BSID test ------> identify the present developmental functioning of infants and determine developmental delays or disabilities if the infants have.

1) The child’s relevant behaviours and measures attention/arousal

2) Orientatiton /engagement

3) Emotional regulation and motor quality

Bayley Scale for Infant Development

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