Eleanor Gibson and Richard Walk investigated the (*) depth perception of these subjects with the visual cliff apparatus.
The willingness to explore, reunion behavior, and separation anxiety exhibited by these subjects was observed in an experiment in which various people entered and left a room with them, proving that they demonstrate secure, ambivalent, and avoidant types of attachment. These subjects, the focus of Mary Ainsworth's "Strange Situation" experiment, demonstrated "circular reactions" in the work of another psychologist. Eleanor Gibson and Richard Walk investigated the (*) depth perception of these subjects with the visual cliff apparatus. These people learn "object permanence" during the sensorimotor stage according to Jean Piaget. For 10 points, name these people who often say their first word at around 12 months.
The willingness to explore, reunion behavior, and separation anxiety exhibited by these subjects was observed in an experiment in which various people entered and left a room with them, proving that they demonstrate secure, ambivalent, and avoidant types of attachment.
infants [or babies; or toddlers; or really young children; or synonyms of those terms; prompt on children and synonyms]