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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Drug Alcohol Depend. 2010 Feb 11;109(1-3):167–174. doi: 10.1016/j.drugalcdep.2009.12.027

Table 2.

Principal components analysis. Values represent factor loadings.

Item Excluding self-report items (n = 177 sessions) With self-report items (n = 78 sessions)
General factor Draw factor General factor Draw factor


Outcome of testing .143 .544 .037 .851
Draws earned -.071 .741 .139 .823
Draws possible at next session .188 .739 .217 .457


Desire for prizes .665 .142 .514 .314
Discussion of self-reports -- -- .792 .171
Relate self-report to objective indicators -- -- .669 .340
Relate self-reports to consequences of positive samples -- -- .570 .532
Compliment/praise patient's efforts .860 .127 .867 .073
Communicate confidence .867 .065 .858 -.031
General skillfulness .895 -.012 .781 .275
Maintain structure .781 .302 .679 .494
Empathy .885 .097 .827 .307