Development, Validity and reliability of Positive and Healthy thinking Inventory (PHtI) Arip Mohammad Aziz Shah Mohamed1, Salim Nadratul Shima2, Jais Samsiah Mohd1, Sa'ad Fauziah3 1Associate Professor, Faculty of Education and Human Development, Sultan Idris Education University, Tanjong Malim, Perak, Malaysia 2Faculty of Education and Human Development, Sultan Idris Education University, Tanjong Malim, Perak, Malaysia 3Doctor, Faculty of Education and Human Development, Sultan Idris Education University, Tanjong Malim, Perak, Malaysia Online published on 3 April, 2018. Abstract The purpose of this study is to build, acquire content validity and reliability of Positive and Healthy Thinking Inventory (PHTI). PHTI is built on the integration Model of Positive and Healthy Thinking based on CBT by Aaron T. Beck1 (1964) and Multidimensional Self Concept Model (MSCS) by Bracken2 (1992) that stresses on the aspect of family, feeling, social, physical, efficiency and academic. Overall, the PHTI have 90 items (nine positive items and six negative items for each sub-scale) were divided into Sub Scale 1: Families (15 items), Sub Scale 2: Feelings (15 items), Sub Scale 3: Social (15 items), Sub Scale 4: Physical (15 items), Sub Scale 5: Skills (15 items) and Sub Scale 6: Academic (15 items). PHTI was given to nine expert panels which consists of five members of the academic and four practitioners of school counselors. PHTI has good overall content validity of 8.76 while the validity of the content based on Family sub-scale at 8.80, Feeling sub-scale at 8.70, Social sub-scale at 8.80, Physical sub-scale at 8.70, Efficiency sub-scale at 8.80 and Academic sub-scale at 8.70. Result shows that the PHTI has high content validity. Reliability of PHTI has been tested randomly towards 50 respondents consisted of Universiti Pendidikan Sultan Idris students. PHTI analysis of overall reliability is high at.950, while the sub-scale analysis also showed good results, namely.664 for Families,.750 for Feelings,.826 for Social,.836 for Physical,.817 for Efficiency, and.846 for Academic. Thus, reliability and validity of PHTI findings were good and helpful and could be applied in higher education institutions, workplaces and schools to produce a positive thinking and healthy human being. Top Keywords Content Validity, Reliability, Positive and Healthy Thinking Inventory. Top |