Of the 176 IST test items there is only 1 item that is not good, ie aitem 155 (WU19) so that aitem 155 should be discarded. Based on the results of the analysis that has been done on the IST test instrument can be seen that in general the quality of IST test included in either category. The logit scale (log odds unit) generated in the Rasch model is the scale of the same interval and is linear from the data ratio (odds ratio). The quality of intelligence measurements made with the Rasch model will have the same quality as the measurements made in the physical dimension in the field of physics.
These five conditions of measurement, so far only Rasch model that can fulfill it.
P class="IABSTRAK"> Abstract: The concept of objective measurement in the social sciences and educational assessment must have five criteria: 1) Gives a linear measure with the same interval 2) Conduct a proper estimation process 3) Finding unfeasible items (misfits) or outliers 4) Overcoming the lost data 5) Generate replicable measurements (independent of the parameters studied).
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