Why students do not engage in contract cheating: a closer look

Table 2 Reliability statistics for the measures of individual differences used in this study

Measures	Omega ω_h	Cronbach’s α	Confidence Interval
Measures	Omega ω_h	Cronbach’s α	Lower	Upper
Brief Self-Control Scale	0.55	0.83	0.81	0.85
Need Satisfaction and Frustration
Autonomy Satisfaction	-	0.87	0.84	0.89
Autonomy Frustration	-	0.72	0.68	0.77
Competence Satisfaction	-	0.87	0.84	0.89
Competence Frustration	-	0.76	0.71	0.80
Short Grit Scale
Consistency of Interest	*	0.85	0.83	0.87
Perseverance of Effort	0.68	0.70	0.66	0.75
Short Dark Triad
Machiavellianism	0.48	0.71	0.66	0.75
Narcissism	0.57	0.70	0.66	0.74
Psychopathy	^†	0.71	0.66	0.75
College Self-Efficacy Instrument	0.66	0.86	0.84	0.89
Social Desirability Scale	0.47	0.70	0.66	0.74

Omega cannot be calculated on three or fewer items. *Omega unable to converge. ^†Ultra-Heywood case detected

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