Scatterplots of RAU scores against age (7A) and vocabulary score (7B) for children with hearing loss with adult-directed and child-directed materials (ADSF/CDSF-female talker, ADSM/CDSM-male talker). Fig 7C shows the relationship between RAUs and vocabulary scores for younger and older children listening to the four sets of materials (ADSF/CDSF, adult/child-directed speech, female talkers; ADSM/CDSM, adult/child-directed speech, male talkers). Lines indicate linear regression fits. Solid line – ADSF, dashed line – ADSM, dotted line – CDSF, two dashed line - CDSM.