Published Paper Details:

The study was carried out to construct a valid and reliable test in Life Science for secondary school students. The investigator conducted to construct and standardize an achievement test in Life Science for class IX students to measure their achievement. The achievement test and the lesson plans were developed on selected topics of Life Science from Class IX Text Book issued by WBBSE (West Bengal Board of Secondary Education) on the basis of the blue print prepared for the achievement test in the light of objectives. After the items were written, the investigator consulted the subject expert for checking the items framed with respect to the faulty language and defects in wordings and also to verify whether the items measure what was purports to measure at the level of achievement. Initially Eighty five (85) items were framed on selected topics of Life Science textbook. A blue-print was prepared for the achievement test in the light of certain objectives. Individual try-out of the first draft was done on six students. Discussions with the subject experts were held and the test was modified accordingly. The second draft with Seventy-six (76) items was administered on 20 students. Then the Item difficulty Value (DV) and Item Discrimination Power (DP) were determined by adopting Kelley�s (1939) method. On the basis of Item difficulty value, item discrimination power and also distractor analysis, the preliminary draft of the achievement test was again modified. In total 60 items having difficulty value (DV) ranging from 0.20 to 0.75 and the items ranging from 0.20 to 0.90 on the discriminatory power (DP) were retained in the achievement test. The reliability and validity of the test was also administered.