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This Concept Map, created with IHMC CmapTools, has information related to: realiablity and validty, content-related evidence reffers to the content and format of instrument., validity reffers to the appropriteness, meaninglfulness, correctness and usefulness of any infrenences a researcher draws based on data obtained through the use of instrument., equivalent-forms reffers to involving administering two different but equivalent ,forms of an instrument to the same group at same time, expectancy table two-way chart useful to: researcher in using data collected in schools ., construct-related evidence reffers to the nature of the psychological construct or characteristic being measured by the instrument., test-retest reffers to involving administering the same instrument twice to the same group of individuals after a certain time interval has elapesd., criterion-related evidence reffers to the relationship between scores obtained using the instrument and scores obtained using one or more instrument ., validity it has a three main types, they are : criterion-related evidence, Reliabilty has a three types , they are equivalent-forms, validity it has a three main types, they are : construct-related evidence, criterion-related evidence evaluated by expectancy table, involving comparing responses to different sets of items that are part of instrument. has a three types might be : split-have procedures, or validity coefficient reffers to numerical index representing the degree of correspondence between scores on an instrument and criterion, the relationship between scores obtained using the instrument and scores obtained using one or more instrument . might be one of those two: predictive, Reliabilty evaluated: reliability coefficient, predictive reffers to when researcher allwo time interval to elapse instrument and obtaining the criterion scores., involving comparing responses to different sets of items that are part of instrument. has a three types might be : kuder-richardson approach, Reliabilty has a three types , they are internel consistency, involving comparing responses to different sets of items that are part of instrument. has a three types might be : alpha coefficient, concurrent reffers to when instrument data and criterion data are gathered at nearly the same time.