Jackson Personality Inventory (JPI)

—Like the EPPS, JPI were based on Murray’s (1938) theory of needs.

—Unlike EPPS, it has specific definitions of each need

—So items for each scale could be as independent as possible, an important consideration in creating homogeneous scales.

—The latest revision of the JPI (JPI-R) has one form consisting of 300 true–false items and 15 scales.

—These 15 scales in five higher-order dimensions termed analytical, extroverted, emotional, opportunistic, and dependable.

—JPI scales have no item overlap

—the scales are relatively independent, with most intercorrelation coefficients at -/+.3

—15 scales Jackson Personality Inventory (JPI)