Figure 6.

A summary of mean motion coherence thresholds from previous studies of global motion perception in infants and children which used RDKs with dynamic signal and noise dots. (A) Results from studies of children aged 1 to 5 months. (B) Results from studies of children aged 3 to 7 years. (C) Results from studies of that also included adult participants. The color of the markers denotes the technique used to measure the motion coherence threshold; blue = OKR, red = preferential looking (PL), and green = behavioral responses. The shape of the markers in combination with the color of the marker denotes the study; = Wattam-Bell,³² = Bantan and Bertenthal,⁵¹ = Mason et al.,³⁰ = Ellemberg et al.,⁶⁴ = Gunn et al.,⁹ = Parrish et al.,³⁶ = Hadad et al.,³⁴ and = Narasimhan and Giaschi.³⁵ The (a–f) labels are to be used in conjunction with Table A1 provided in the Appendix and identify different stimulus parameters used within individual studies. The black horizontal lines represent the average thresholds found in our study for 2-year-old children (OKR) and adults (OKR and behavioral).