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. Author manuscript; available in PMC: 2017 Aug 1.
Published in final edited form as: Dev Psychopathol. 2016 Jul 18;29(3):901–917. doi: 10.1017/S0954579416000560

IBQ-R factor loadings at 3 months(N=328) and 6 months(N=418)

Scale Negative Emotionality Positive Emotionality

3M 6M 3M 6M
Activity Level .47 .42 .34 .32
Distress to Limitations .78 .78
Fear .33 .39
Duration of orienting .69 .56
Smile and Laugh .68 .67
High Pleasure .67 .64
Low Pleasure .64 .63
Soothability −.39 −.40 .30 .26
Falling Reactivity −.62 −.60
Cuddliness −.41 −.48 .31
Perceptual Sensitivity .60 .60
Sadness .64 .67
Approach .67 .57
Vocal Reactivity .78 .72