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Scree Plot for the SSAT

Scree Plot for the SSAT

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Figure 2: Scree Plot for the SSAT
Figure 3: Histogram showing the discriminatory index of the SSAT
Figure 5: Histogram showing the guessing index of the SSAT
-Parameter Index for the SSAT
Item Response Theory Validation of Social Studies Aptitude Test
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  • Dec 2023
This study assessed the psychometric properties of the Social Studies Aptitude Test (SSAT) using the 3-Parameter Item Response Theory Model. Four research questions guided the study. A 100-item multiple choice SSAT, developed by Jessa, et al. (2023) was used as an instrument for the study. The data were collated and analysed using chi-square goodne...
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Context 1
... answering the above research question, the data obtained from the eld were subjected to a factor analysis using principal component analysis of the varimax method. Using Guttman-Kaiser rule, all factors with eigenvalues greater than 1 were retained as the factor that the items measure. Analysis of the scree plot as shown in Fig. 2 shows the underlining construct or unidimensionality of the SSAT. The SPSS statistical software was used in the analysis. Figure 2 shows the scree plot for the SSAT. From the gure, a careful examination of the scree plot shows that there is only one construct before the breaking point or elbow joint. This therefore succinctly shows the ...
Context 2
... SPSS statistical software was used in the analysis. Figure 2 shows the scree plot for the SSAT. From the gure, a careful examination of the scree plot shows that there is only one construct before the breaking point or elbow joint. ...