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ITEM SELECTION

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

test- item selection for incorporating in a test battery based upon the final psychometric properties of the test battery.

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ITEM VALIDITY

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

In a test or experiment the extent to which an individual item measures what it purports to measure.

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ITEM WEIGHTING

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

A numeric value assigned to a test item, which shows its proportion of the total score of the test, say, may be assigned a value of 40, representing 40 out of 100 possible points.

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ITEM-TO-ITEM RELIABILITY

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

the response correlation to one particular item in a test or subtest with resonses to another particular item in that test or subtest.

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ITERATION

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

A certain computational step repetition until futher repetition no longer changes the outcome or until the repetition meets some other predefined criterion.

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ITERATIVE DESIGN

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

The process of using outcome from prior testings or evaluation to make changes on the layout during the development cycle of a new or improved product.

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ITINERANT TEACHER

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

a commiting teacher, who travels to a couple of schools or classrooms as to provide specialized instruction for children.

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IUPSYS

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

International union of psychological science.

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