Descriptive statistics for the study measures.

<p><sup>1</sup> PT: Preference Task.</p><p><sup>2</sup> CPTTAcc: the difference in accuracy of remembering infant versus adult faces during the unexpected recognition part of the Count the Purple Triangles Task. Positive value indicates better accuracy for infants.</p><p><sup>3</sup> CPTTTime: the difference in time (milliseconds) spent searching for purple triangles when a baby is on the screen compared to when an adult is on the screen during the Count the Purple Triangles Task. Positive value indicates more time spent searching while infants were on the screen.</p><p><sup>4</sup> LSOA: Lower Super Output Area. It is an Index of Multiple Deprivation ranking small areas in England and Wales on a scale from 1 (most deprived) to 32,482 (least deprived).</p><p><sup>5</sup> Age at Mother Absence: the age at which mother stopped living in the same residence as participant (n = 17).</p><p><sup>6</sup> Age at Father Absence: the age at which father stopped living in the same residence as participant (n = 127).</p><p><sup>7</sup> Family Support: the minimum possible score was 5 and the maximum was 35, higher scores indicate more positive feelings of family support.</p><p><sup>8</sup> Perceived Neighbourhood Safety and Quality: the minimum possible score was 8 and the maximum was 32, higher scores indicate more positive perceptions of neighbourhood.</p><p><sup>9</sup> Childhood Adversity: Timing of Father Absence and Step Father Presence are not included in this table because they are categorical variables. They are discussed in the text of the <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0085013#s4" target="_blank">Results</a> section.</p>