8 Using psychology to study prayer: inward, outward, upward connections

External links

• Kevin L. Ladd and Bernard Spilka (2006), ‘Inward, Outward, Upward Prayer: Scale Reliability and Validation’, Journal for the Scientific Study of Religion
• Kevin L. Ladd (2017), ‘Toward A Tri-partite Psychological Model of Prayer’, Revista Pistis Praxis 9 (1): 205.
• Aryeh Lazar (2017), ‘A Reexamination of the Structure of the Inward Outward Upward Prayer Scale’, The International Journal for the Psychology of Religion, 27:3.