Fig 1.
The upright (left) and inverted (left) images presented to infants.
Three areas of interest (AOIs) were set to measure the looking time to the blobs. In the upright image, the ‘top’ area covers the upper blob, and the ‘bottom’ area includes the lower blob. The two areas that cover left and right blobs were virtually concatenated as one AOI and the area is called the ‘middle’ area.
Fig 2.
The left side panels present looking-time change ratios as a function of area of interest (AOI) for the inverted image from the silent to sound conditions. The right side panels present data for the same dependent variable as the left side, but under the upright-image condition. Data obtained from 8-, 10-, and 12-month-old infants are shown in top, middle, and bottom panels, respectively.