Table 5.

Item loading and relevant cross‐loading into five identified factors (varimax rotation)

	Beaumont behaviour inventory questions	Identified BBI components
		1	2	3	4	5
1	Repeats words/sentences said by others	0.745
	Not aware of mistakes	0.647
	Excessively stores food in mouth	0.632
	More withdrawn	0.607	0.442
	Lack of embarrassment	0.594
	Acts without thinking	0.580
	Difficulties with conversation	0.564
	Difficulty with everyday language	0.550			0.471
	Less able to react to difficulties	0.549
	Hyperorality	0.541
	Repeats phrases again and again	0.520	0.482
	Acts inappropriately in public	0.481
	Obsessive countinga	0.306
	Seeks social contact		0.672
	Shows less emotion		0.623
	More distractible/unable to concentrate		0.539
2	New food preferences		0.502
	Dislikes change in routine		0.448
	Smokes more		0.415
	Eats much morea		0.270
	Less picky about food preferencesa		0.245
	New unusual habits			0.621
	More aggressive			0.617
	Less concerned about others		0.496	0.543
	Increased irritability			0.497
	Perseverative speech			0.478
3	More selfish			0.474
	Less concerned about hygiene	0.460		0.464
	Emotional lability			0.444
	Repetitious behaviora			0.383
	Overly sensitive to sensations (noise)a			0.371
	Less aware of physical sensationa			0.326
	Developed unusual ritualsa			0.297
	Overly concerned with neatness				0.751
4	Constantly aligns things in a certain way				0.720
	Constantly checking clocks/switches		0.477		0.483
	Change in sexual interest				0.441
	Sees/Hears Things/People					0.839
5	Handles things for no apparent reason					0.736
	New bizarre beliefs					0.674
	Hoards, hides, or collects things					0.586
	Variance explained	24.4	6.2	5.7	4.6	4.1

Extraction Method: Principal Component Analysis. Rotation Method: Varimax with Kaiser Normalization. Bold figures display which factor the items loaded best with. BBI, Beaumont Behavioural Inventory.

^aItems which are considered weak, that is, <0.4, which do not load to an individual factor.