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Paper Topic:

Activity 5: External, Internal, and Construct Validity

External , Internal , and Construct Validity

Compare and Contrast the characteristics of external , internal , and construct validity

Internal , external , and construct validity are all forms of validity which determines the validity of the research . While they all assess the making of the particular program they differ in the way they are used as discussed below

Construct Validity

In the case of construct validity , its characteristic is that it is used to measure characteristics . Commonly used in social science and psychometrics research , the construct validity measures characteristics using a number of

sets of observable indicators where the correlation of the given variables is being examined or evaluated . Trochim defines it as degree to which inferences can legitimately be made from the operationalizations . For Trochim (Trochim chap . 3 , pp . 56-59 operationalizations mean the translation of an idea or construct into something real . Hence , when one has an idea of a program he or she would like to create , the construct validity is the degree to which the actual program reflect the ideal or the program that has been conceptualized or envisioned . The characteristics therefore of construct validity is that it is used to measure the characteristic of the particular program . As Zikmund noted construct validity in its simplest form : if the measure behaves the way it is supposed to , in a pattern of intercorrelation with a variety of other variables , there is evidence for construct validity (Zikmund ,

. 303

External

In contrast with construct validity which is referred to as a measure use...

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