Figure 1.

The MST consists of two phases: an incidental encoding phase and a retrieval (testing) phase. The incidental encoding phase consists of a series of 64 images where children are asked to indicate whether the items would appear indoor or outdoor. Upon completion of the incidental encoding phase, children completed the retrieval or testing portion of the MST. During test, children were presented with 32 target images (identical images that appeared during encoding), 32 foil images (images that did not appear during encoding), and 32 lure images (variants of images presented during encoding). Children were asked to indicate whether the presented object was “old” (they had seen the image before), similar (the images were slightly different from images presented during test), or “new” (images were novel and not seen during test). Lure items were varied by similarity ratings on a scale from 1 to 5, with 1 being the most similar (bin 1: most difficult to discriminate) and 5 being the least similar (bin 5: easier to discriminate).