Janeen enters the playroom of the psychology lab with her 1-year-old daughter peggy. initially, peggy clings to her mother, but then becomes interested in the attractive toys in the playroom. she picks up a toy and brings it back to her mother, then drops it and approaches the toy box again. peggy cries when janeen leaves the room, but quickly calms down again when her mother returns. peggy would most likely be classified as: