A validity and reliablity study to reduce of the measurement of interest’s item’s number and expand of age range

The main aim of this study was to make reliablity and validity study ofpercieved ability (Numerical ability, Verbal ability) and interest scales (Social Science,Persuasion, Social Support, Trade, Job Details, Mathematics) after reducing theitems number and expanding age range.Perceived ability and interest scales that reduced item?s numbers was appliedto sample of study whom totaly 1171 students, between 12-20 age range. The datawas analysed for reliability and validity of interest scales. Results about validityshowed that reduced item?s number scale?s Cronbach alpha scaores had enoughcorrelation with item total scores.End of the study, there were significant outputs about reducing items numberof ability and interest scales and applying on a wide age range.Key Words: Interest, Percieved Abilty and Interest Scale, Reliabilty Validity Study,Age Range