Speed of retrieval from long-term memory in relation to age, familiarity, and datedness of information

The time required to name four groups of pictures was measured in 83 community dwelling males (18-70 years of age). One group consisted of objects used 50 to 70 years ago (unique dated exemplars), and another consisted of objects unique to contemporary times (unique contemporary exemplars). For comparison, other pictures of contemporary and dated objects commonly used in both periods were employed. There were three major findings. One, the familiarity of the pictured object is the major determinant of the time required to retrieve its name. Older subjects named the dated unique objects that were relatively more familiar to them more rapidly than did younger adults, while the reverse was true for contemporary unique objects. No age difference in the speed of naming common contemporary objects was found. Two, the overall age-related difference in naming latency was attributed to perceptual-motor aspects of the task. Three, the physical features as well as the familiarity of the object contributed to the speed of retrieval of the object's name.