Table 4.

Factor Loadings of MBA Items by Sample

Factor/Item	Development Sample	Validation Sample
Factor 1: Motor Dysfunction
Bradykinesia	0.86	0.83
Dystonia	0.67	0.59
Scoliosis	0.85	0.78
Hypertonia/rigidity	0.62	0.73
Factor 2: Functional Skills
Hand clumsiness	0.87	0.87
Does not reach for objects or people	0.75	0.74
Motor skills	0.85	0.85
Speech disturbance	0.54	0.55
Communication skills	0.41	0.42
Feeding difficulties	0.58	0.55
Chewing difficulties	0.62	0.53
Factor 3: Social Skills
Does not respond to spoken words/acts deaf	0.60	0.62
Poor eye/social contact	0.46	0.62
Lack of sustained interest	0.52	0.41
Factor 4: Aberrant Behavior
Self-mutilation/pulling hair or ears/scratching	0.55	0.45
Aggressive behavior	0.98	0.94
Biting self and others	0.53	0.27
Factor 5: Respiratory Behaviors
Bruxism	0.44	0.32
Breath holding	0.85	0.89
Hyperventilation	0.59	0.60
Air-saliva expulsion/drooling	0.44	0.47
Model Fit Indices
CFIa	0.94	0.93
TLIb	0.93	0.92
RMSEAc	0.06	0.06

^aCFI = comparative fit index.

^bTLI = Tucker-Lewis index.

^cRMSEA = root mean square error of approximation.