Original sentence: Some authors have suggested continuous rather than categorical gradations between attachment patterns, and have discussed dimensions of underlying security rather than the classifications derived from Ainsworth's work
Edited sentence: " As was noted above, ethologists have suggested other behavioural measures that may be of greater importance than Strange Situation behaviour.An examination of data from 1139 15-month-olds showed that variation was continuous rather than falling into natural groupings.However, a categorical model is not necessarily the best representation of individual difference in attachment.Some authors have questioned the idea of attachment patterns, thought to be measured by techniques like the Strange Situation Protocol.Such techniques yield a taxonomy of categories considered to represent qualitative difference in attachment relationships (for example, secure attachment versus avoidant).This criticism introduces important questions for attachment typologies and the mechanisms behind apparent types, but in fact has relatively little relevance for attachment theory itself, which "neither requires nor predicts discrete patterns of attachment