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. Author manuscript; available in PMC: 2015 Feb 17.
Published in final edited form as: Child Dev. 2015 Feb 2;86(1):80–93. doi: 10.1111/cdev.12345

Table 1.

Psychometric Properties of Study Variables.

n M SD Range
Skew
Potential Actual
Adoptive Mother Harsh Parenting 463 1.72 0.58 1.00 – 7.00 1.00 – 4.57 1.12
Adoptive Father Harsh Parenting 452 1.81 0.64 1.00 – 7.00 1.00 – 4.57 1.13
Birth Mother Harm Avoidance 486 9.15 5.11 0 – 20.00 0.00 – 20.00 0.17
Birth Mother Reward Dependence 486 10.06 2.78 0 – 15.00 2.00 – 15.00 −0.40
Adoptive Mother Harm Avoidance 494 8.07 4.35 0 – 20.00 0.00 – 20.00 0.31
Adoptive Mother Reward Dependence 495 11.73 2.53 0 – 15.00 2.00 – 15.00 −0.90
Adoptive Father Harm Avoidance 478 5.48 4.10 0 – 20.00 0.00 – 20.00 0.81
Adoptive Father Reward Dependence 478 9.57 2.93 0 – 15.00 1.00 – 15.00 −0.40
Adoptive Parents’ Observed Marital Relationship Quality 453 7.25 1.09 1.00 – 9.00 2.50 – 9.00 −1.29
Infant Smiling & Laughter 489 5.10 0.68 1.00 – 6.00 2.21 – 6.67 −0.32
Infant Distress to Novel Stimuli 475 2.48 0.55 1.00 – 6.00 1.00 – 4.32 0.48
Infant Distress to Limitations 490 3.17 0.62 1.00 – 6.00 1.13 – 5.24 0.16
Obstetric Complications 503 2.18 1.29 0 – N/A 0.00 – 6.00 0.48
Openness of Adoption 503 0.03 0.91 - −2.23 – 1.86 −0.16
Adoptive Mother Age 498 37.80 5.43 - 24.48 –52.53 −0.05
Adoptive Father Age 482 38.93 5.83 - 25.14 – 60.55 0.35

Notes: There was no upper limit on the measure of Obstetric Complications.

The Openness of Adoption variable was a composite (averaged) score of adoptive mothers’, adoptive fathers’, and birth mothers’ standardized ratings on 1 – 7 rating scales regarding openness.

Potential range is not relevant for adoptive mother and father ages.