Table 3.

Results of Traditional Confirmatory Factor Model Versus Bifactor Model on Parent-Rated Attention-Deficit/Hyperactivity Disorder Symptoms.

	Traditional confirmatory factor model		Bifactor model
	1 Factor		2 Factor		2 Factor
Symptoms	1	1	2	g	F1	F2
Careless	.79	.82		.72	.39
Attention	.87	.89		.84	.30
Listen	.83	.82		.86	.11
Finish	.88	.92		.80	.43
Disorganized	.87	.90		.74	.54
Avoids	.80	.84		.70	.46
Loses	.81	.84		.73	.42
Distracted	.85	.85		.88	.13
Forgetful	.86	.89		.73	.54
Fidgets	.83		.85	.82		.25
Sitting	.80		.83	.79		.26
Climbs	.81		.86	.74		.42
Loud	.77		.80	.74		.30
Motor	.81		.87	.73		.50
Talkative	.74		.78	.67		.43
Blurts	.78		.83	.71		.42
Waiting	.84		.86	.82		.30
Interrupts	.80		.85	.75		.42

Note. Careless = often does not give close attention to details or makes careless mistakes in schoolwork, work, or other activities; Attention = often has trouble keeping attention on tasks or play activities; Listen = often does not seem to listen when spoken to directly; Finish = often does not follow through on instructions and fails to finish schoolwork, chores, or duties in the workplace (not due to oppositional behavior or failure to understand directions); Disorganized = often has trouble organizing activities; Avoid = often avoids, dislikes, or doesn’t want to do things that take a lot of mental effort for a long period of time; Loses = often loses things needed for tasks and activities (e.g., toys, assignments, pencils, books, or tools); Distracted = is often easily distracted; Forgetful = is often forgetful in daily activities; Fidgets = often fidgets with hands or feet or squirms in seat when sitting still is expected; Sitting = often gets up from seat when remaining in seat is expected; Climbs = often excessively runs about or climbs when and where it is not appropriate; Loud = often has trouble playing or doing leisure activities quietly; Motor = is often “on the go” or often acts as if “driven by a motor”; Talkative = often talks excessively; Blurts = often blurts out answers before questions have been finished; Waiting = often has trouble waiting one’s turn; Interrupts = often interrupts or intrudes on others (e.g., butts into conversations or games).