The preliminary version of the TISP was pilot tested on 101 of Year Six primary school pupils from a primary
school in Kuala Lumpur. These pupils have learned SPS in the science lesson for six years since Year One. The
pupils were given 40 minutes to complete the test. Data collected was also used to investigate test reliability and
validity. The reliability for the test was provided for by the use of index coefficient of Cronbach Alpha. Item indices
were examined for the purpose of item revision. Item analysis was performed in order to determine item difficulty
and discrimination. Item with correlation above 0.30 were considered to have a satisfactory power of discrimination.