simplify this for me:Infant gaze was coded offline by two to three coders who determined whether their eyes were looking center, right of center, left of center, offscreen (i.e., blinking or looking away), or undetected (i.e., out of the camera's field of view). Coders were blind to block and condition information. During frames from the exposure and fixation phases, the coder was instructed that the infant was "probably looking at center." This instruction was given to help calibrate coders to where the center of the screen was, but coders were allowed to indicate other responses if they believed the infant was not looking at the center. No instruction about likely looking was given for frames collected during the VPC test. Coders reported the same response code on an average of 94.4% (SD = 3.53%; range across participants = 83.8-97.6%) of frames. To combine across coders, we assigned each frame the modal response across coders from a moving window of five frames centered on that frame and used the response from the previous frame in the case of ties. For a block to be included, infants needed to be looking at the screen (gaze coded as "center" during exposure and fixation