Anderson and Prussia's (as cited in Houghton & Neck, 2002, p. 676) self-leadership scale
was administered twice; "in the second administration, one sub-scale dropped below
Nunnaly's (1978) recommended scale reliability threshold of 0.70 to an alpha of 0.62,
thus indicating significant instability across samples" (p. 676). According to Ho and
Nesbit (2009) "the Anderson and Prussia Self-Leadership Questionnaire suffered from a
number of psychometric problems and required further refinement" (p. 454).