The Naglieri Nonverbal Ability Test NNAT2 Parkway School District 20092010

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The Naglieri Nonverbal Ability Test
(NNAT2)Parkway School District2009-2010

• Dr. Denise Pupillo
• Coordinator of Gifted Education and Grants and
  Funding
• Parkway School District

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NNAT2Naglieri Nonverbal Ability

• Naglieri Nonverbal Ability Test (second
  edition)NNAT2 uses progressive matrices to allow
  for a culturally neutral evaluation of students
  nonverbal reasoning and general problem-solving
  ability, regardless of the individual students
  primary language, education, culture or
  socioeconomic background

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Why the NNAT2?

• The NNAT2 is a brief, culture-fair, nonverbal
  measure of ability
• NNAT2 items assess ability without requiring the
  student to read, write, or speak
• NNAT2 uses abstract figural designs, and does not
  rely on verbal skills or achievement

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Uses of NNAT

• Use NNAT-2 to evaluate
• General ability in the entire student population
• Students of limited English skills from diverse
  cultural backgrounds
• Gifted and talented students
• Non or intermediate English speakers, and
  students learning the English language for the
  first time
• Students with limited motor skills, hearing
  impairment, and minimal color-vision impairment
• Students whose economic or social circumstances
  have limited their acquisition of knowledge and
  verbal skills

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Special Advantages of NNAT

• Culturally fair content
• All nonverbal items
• Universal content
• No reading required
• Items do not measure achievement
• Little motor skills required
• Excellent psychometric qualities
• Administered in 30 minutes

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NNAT and NNAT2

• The NNAT and NNAT2 are both unidimensional
  nonverbal tests that use progressive matrices to
  measure reasoning and
• general problem-solving ability
• NNAT and NNAT2 both have seven levels (A to G)
  spanning the ages 5.0 to 17.11 and
• grades K through 12

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Differences between the NNAT and the NNAT2

• It is re-normed.
• It is redesigned to engage and better assess the
  general student population.
• It is available for on-line administration.
• There are 48 items rather than 38.
• The NNAT2 renames the standard score as the
  Naglieri Ability Index (NAI), changing the metric
  to a standard deviation of 16 (albeit still with
  a normative mean score of 100).

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NNAT2 Development

• Examinees have 30 minutes to complete 38 items
  (NNAT) or 48 items (NNAT2)
• All knowledge required to solve each item is
  presented in the item, so that factual knowledge,
  vocabulary, mathematics, and reading skills are
  not required.
• Items were selected based on
• item difficulty
• correlation to total test
• bias analyses
• fit statistics
• Each level overlaps with adjacent ones

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Structure of NNAT2 is the Same as the NNAT

• Seven levels
• 48 items per level
• Each level was designed to have
• good ceiling / floor
• good reliability
• as many as four item clusters

• Level Grades
• A K
• B 1
• C 2
• D 3 4
• E 5 6
• F 7 - 9
• G 10 - 12

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NNAT Items

• How were they developed?

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NNAT Item Clusters

• NNAT item types identified from past research (J.
  Carlson C. Jensen, 1980 J. Naglieri W.
  Insko, 1986)
• The NNAT has the following item types
• Pattern Completion
• Reasoning by Analogy
• Serial Reasoning
• Spatial Visualization
• NOTE These are Not different types of
  intelligence

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Cluster Descriptions

• Pattern Completion requires perception of a
  pattern within a large rectangle in which a piece
  is missing, extending the pattern into the
  missing space.
• Reasoning by Analogy requires reasoning about
  the logical relationship between several
  geometric shapes (changing in one or more
  dimensions, such as shape and shading) across
  rows and down columns.
• Serial Reasoning requires recognition of a
  sequence of shapes (e.g., circlesquaretriangle)
  and how the sequence changes across rows and down
  columns.
• Spatial Visualization requires recognition of
  how two or more designs would look if combined
  may involve rotations or intersection shapes.

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Summary of NNAT Scoring

• Raw Scores are converted to scaled scores BY
  LEVEL
• Scaled scores are converted to NAI Scores BY AGE
  (in 1/4 year intervals)
• Percentiles and Stanines are provided for Scaled
  Scores and NAI Scores
• Age Equivalents are given for Scaled Scores

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Naglieri Ability Index (NAI)

• NAI Scores are set at a mean of 100 and SD of 16
  based on the childs age
• The lowest NAI Score is 50 (-3.3 z)
• The Highest NAI Score is 150 (3.3 z)

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Sample
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5
16
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1
2
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5
17
2
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1
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5
18
4
3
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1
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5
19
4
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5
1
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20
5
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5
1
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21
6
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5
1
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22
7
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1
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