This study explored the reliability and validity of the Spiritual Intelligence Self-Report Inventory (SISRI) designed by King (2008) when administered to students enrolled secondary education in Mashhad, Iran. To this end, the Persian version of the SISRI was administered to 344female grade three senior high school (G3SHS) students majoring in humanities, sciences, and mathematics. The subjection of the collected data to Principal Axis Factoring and rotating the extracted factors via Varimax with Kaiser Normalization. We found seven latent variables whose initial eigenvalues were one and higher, i.e., Purposive, Transcending, Contemplative, Meta-conscious, Theo-meditative, Theorizing, and Visionary. The inventory itself along with its Purposive, Transcending and Meta-conscious factors was found to be reliable. Since Contemplative, Theo-meditative, Theorizing and Visionary factors consisted of just one statement, their reliability could not be estimated. These four factors did, however, correlate significantly not only with each other but also with Purposive, Transcending and Meta-conscious dimension of spiritual intelligence. The results are discussed in terms of schema theory and suggestions are made for future research.

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