DOI: 10.1101/510081Jan 4, 2019Paper

Post exam analysis: Implication for intervention

BioRxiv : the Preprint Server for Biology
Kindu Nibret Tsegaye


The difficulty index, discrimination and distracter efficiency of college level exam paper was analyzed as an input for taking actions in future test developments. The exam papers of 176 first-year regular pre-service diploma students at Gondar CTE were analyzed using descriptive analysis. Difficulty indices and distracter efficiencies were calculated using Microsoft Excel 2007. Other test statistics such as mean, bi-serial correlations and reliability coefficients were computed using SPSS version 20. Results showed that the mean test score, out of 31, was 17.23 ± 3.85. Average difficulty and discrimination indices were 0.56 (SD 0.20) and 0.16 (SD 0.28), respectively. The mean distracter efficiency was 92.1% (SD 17.2%). The reliability of the test was 0.58. Out of 31, 13 (41.9%) items were either too easy or too difficult. Only two items fell into good or excellent discrimination power. Inconsistency in option formats and inappropriate stems were observed in the exam paper. Based on the results the college level exam paper has acceptable level of difficulty index and distracter efficiency. However, the average discrimination power of exam was very low (0.16, acceptable ≥ 0.4). The internal consistency reliability was also less ...Continue Reading

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