Development of the Infidelity Tendency Comprehensive (ITCh) Scale

Infidelity is known to influence relationship dynamics negatively. However, it remains a societal issue in the Philippines. The purpose of this study was to develop an instrument that measures the likelihood of Filipino young adults to commit infidelity. The Infidelity Tendency Comprehensive (ITCh) Scale aims to generate sufficient data to aid the rising number of individuals committing infidelity. A sample of 500 Filipino young adults aged 18 to 25 was chosen using simple random sampling to ensure a representative population. The initial 80-item scale was refined through a pilot test with 50 respondents, resulting in a 45-item version. Principal Axis Factoring (PAF) was employed to identify the underlying factors, supported by the Kaiser-Meyer-Olkin (KMO) measure (0.954) and Barlette’s Test of Sphericity (p<0.05). Factor analysis revealed five key factors: sexual arousal, insecurity, extroversion, relationship dissatisfaction, and indifference in relationships. The final scale retained 43 items after removing them with low factor loadings. Reliability testing showed a high Cronbach’s alpha of 0. 956, and discriminant validity was confirmed, indicating the scale’s accuracy and relevance. The ITCh scale is a reliable and valid instrument that provides a basis for further research and interventions to build healthier relationships.