Autism spectrum disorder severity as a predictor of Battelle Developmental Inventory – Second Edition (BDI-2) scores in toddlers

OBJECTIVE: The study aimed to evaluate the relationship between the severity of autism spectrum disorder (ASD) symptomology and scores on the Battelle Developmental Inventory, Second Edition (BDI-2) in toddlers (n = 325). METHODS: Total scores on the BDI-2 and individual domain scores were examined to explore the relationship between severity of ASD and developmental quotient, impairment in personal-social skills, adaptive functioning, cognition, and communication. RESULTS: Regression analyses controlled for the impact of age and IQ on results, indicating that higher autism severity scores were associated with overall greater impairment and in the total scores and the individual domains of the BDI-2. The domains were found to be differentially affected by severity of ASD. CONCLUSION: These findings suggest severity of ASD may influence symptom presentation. Clinical implications of study findings are discussed

Measurement of the spin-dependent structure function g1 of the proton

We have measured the spin-dependent structure function g1p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003 < x < 0.7 and 1 GeV2 < Q2 < 60 GeV2. Its first moment, 2b01g1p(x)dx, is found to be 0.136\ub10.011 (stat.)\ub1 0.011 (syst.) at Q2 = 10GeV2. This value is smaller than the prediction of the Ellis-Jaffe sum rule by two standard deviations, and is consistent with previous measurements. A combined analysis of all available proton, deuteron and neutron data confirms the Bjorken sum rule to within 10% of the theoretical valu